diff --git a/.emacs.rational.d/.#config.el#.~undo-tree~ b/.emacs.rational.d/.#config.el#.~undo-tree~
deleted file mode 100644
index e851cdb..0000000
--- a/.emacs.rational.d/.#config.el#.~undo-tree~
+++ /dev/null
@@ -1,4 +0,0 @@
-(undo-tree-save-format-version . 1)
-"4a5393278893732c0283cee67786bb2a47c5180c"
-[nil current nil nil (25137 37704 59576 695000) 0 nil]
-nil
diff --git a/.emacs.rational.d/.config.el.~undo-tree~ b/.emacs.rational.d/.config.el.~undo-tree~
deleted file mode 100644
index f7c5384..0000000
--- a/.emacs.rational.d/.config.el.~undo-tree~
+++ /dev/null
@@ -1,9 +0,0 @@
-(undo-tree-save-format-version . 1)
-"b20f26d4c1a610976323cc8ba3e3402825a52087"
-[nil nil nil nil (25137 43379 69396 762000) 0 nil]
-([nil nil ((6791 . 6793) (6790 . 6791) (t 25137 43364 922509 987000) 6754) nil (25137 43387 694003 567000) 0 nil])
-([nil current ((#("
-
-
-" 0 1 (fontified t ws-butler-chg chg) 1 2 (fontified t ws-butler-chg chg) 2 3 (fontified t)) . 6791) (6794 . 6794)) nil (25137 43387 694000 103000) 0 nil])
-nil
diff --git a/.emacs.rational.d/.config.el~.~undo-tree~ b/.emacs.rational.d/.config.el~.~undo-tree~
deleted file mode 100644
index 1599bdc..0000000
--- a/.emacs.rational.d/.config.el~.~undo-tree~
+++ /dev/null
@@ -1,4 +0,0 @@
-(undo-tree-save-format-version . 1)
-"6219c0e3ab970e5c7a9cb17402a3d8be54b7c012"
-[nil current nil nil (25137 37704 42936 540000) 0 nil]
-nil
diff --git a/.emacs.rational.d/config.el b/.emacs.rational.d/config.el
index ebfcab7..b664026 100644
--- a/.emacs.rational.d/config.el
+++ b/.emacs.rational.d/config.el
@@ -21,6 +21,13 @@
 ;;(require 'rational-windows)
 (require 'rational-use-package)
 
+;; backup in one place. flat, no tree structure
+(setq backup-directory-alist '(("." . "~/.emacs.rational.d/backups")))
+(customize-set-variable
+ 'tramp-backup-directory-alist backup-directory-alist)
+(setq undo-tree-history-directory-alist '(("." . "~/.emacs.rational.d/undo")))
+
+
 (setq user-full-name "JaeYoo-Im"
       user-mail-address "cpu3792@gmail.com")
 
@@ -101,7 +108,7 @@
     (setq dashboard-items '((recents . 10)
                             (agenda . 5)
                             (bookmarks . 5)
-                            ;;(projects . 5)
+                            ;;(projects . 5) <= related projectile
                             (registers . 5)))
     (setq dashboard-set-navigator t)
     ;; Format: "(icon title help action face prefix suffix)"
@@ -142,9 +149,9 @@
                     ;; Also handle undocumented (<active> <inactive>) form.
                     ((numberp (cadr alpha)) (cadr alpha)))
               100)
-         '(75 . 75) '(100 . 100)))))
+         '(80 . 80) '(100 . 100)))))
 (global-set-key (kbd "C-c t") 'toggle-transparency)
-(set-frame-parameter (selected-frame) 'alpha '(75 . 75))
+(set-frame-parameter (selected-frame) 'alpha '(80 . 80))
 
 ;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
 ;;;; EMOJIFY ♌ 
diff --git a/.emacs.rational.d/config.el~ b/.emacs.rational.d/config.el~
deleted file mode 100644
index 7669f9d..0000000
--- a/.emacs.rational.d/config.el~
+++ /dev/null
@@ -1,201 +0,0 @@
-;;; example-config.el -- Example Rational Emacs user customization file -*- lexical-binding: t; -*-
-
-;;; Commentary:
-;;
-;; Rational Emacs supports user customization through a `config.el' file
-;; similar to this one.  You can copy this file as `config.el' to your
-;; Rational Emacs configuration directory as an example.
-;;
-;; In your configuration you can set any Emacs configuration variable, face
-;; attributes, themes, etc as you normally would.
-;;
-;; See the README.org file in this repository for additional information.
-
-;;; Code:
-(require 'rational-defaults)
-(require 'rational-screencast)
-(require 'rational-ui)
-(require 'rational-editing)
-(require 'rational-evil)
-(require 'rational-completion)
-(require 'rational-windows)
-(require 'rational-use-package)
-
-(setq system-time-locale "C")
-(setenv "LANG" "en_US.UTF-8")
-(setenv "LC_ALL" "en_US.UTF-8")
-;; Set further font and theme customizations
-(custom-set-variables
-   '(rational-ui-default-font
-     '(:font "Fira Code Retina" :weight light :height 110)))
-
-(add-to-list 'default-frame-alist `(font . "Fira Code Retina"))
-(set-face-attribute 'default nil :font "Fira Code Retina" :height 110)
-(set-face-attribute 'fixed-pitch nil :font "Fira Code Retina" :height 110)
-(set-face-attribute 'variable-pitch nil :font "Fira Code Retina" :height 110 :weight 'regular)
-(set-fontset-font t 'hangul (font-spec :family "D2Coding" :height 110))
-(setq face-font-rescale-alist
-      '(("D2Coding" . 1.25)))
-
-
-(set-frame-parameter (selected-frame) 'fullscreen 'maximized)
-(add-to-list 'default-frame-alist '(fullscreen . maximized))
-
-(load-theme 'doom-dracula t)
-
-(column-number-mode)
-(global-display-line-numbers-mode t)
-(global-hl-line-mode)
-
-;;; example-config.el ends here
-(setq user-full-name "JaeYoo-Im"
-      user-mail-address "cpu3792@gmail.com")
-(defun toggle-transparency ()
-  (interactive)
-  (let ((alpha (frame-parameter nil 'alpha)))
-    (set-frame-parameter
-     nil 'alpha
-     (if (eql (cond ((numberp alpha) alpha)
-                    ((numberp (cdr alpha)) (cdr alpha))
-                    ;; Also handle undocumented (<active> <inactive>) form.
-                    ((numberp (cadr alpha)) (cadr alpha)))
-              100)
-         '(75 . 75) '(100 . 100)))))
-(global-set-key (kbd "C-c t") 'toggle-transparency)
-(set-frame-parameter (selected-frame) 'alpha '(75 . 75))
-
-;; DASHBOARD
-(straight-use-package 'dashboard)
-(require 'all-the-icons)
-(setq dashboard-set-heading-icons t)
-(setq dashboard-set-file-icons t)
-(setq dashboard-startup-banner 'logo)
-(setq dashboard-center-content t)
-(setq dashboard-week-agenda t)
-(setq dashboard-agenda-time-string-format "%d/%m/%Y %A %H:%M")
-(setq dashboard-items '((recents . 10)
-			(agenda . 5)
-			(bookmarks . 5)
-			(registers . 5)))
-(setq dashboard-set-navigator t)
-;; Format: "(icon title help action face prefix suffix)"
-(setq dashboard-navigator-buttons
-      `((
-	 (,(all-the-icons-octicon "mark-github" :height 1.1 :v-adjust 0.0)
-	   "Github"
-	   "Browse github"
-	   (lambda (&rest _) (browse-url "https://github.com/JaeUs3792")))
-	 (,(all-the-icons-octicon "book" :height 1.1 :v-adjust 0.0)
-	   "My Blog"
-	   "Browse Blog"
-	   (lambda (&rest _) (browse-url "https://jaeus.net"))))))
-(setq dashboard-set-footer nil)
-(dashboard-setup-startup-hook)
-
-
-;; EMOJI
-(straight-use-package 'emojify)
-(global-emojify-mode)
-
-;; Which Key
-(straight-use-package 'which-key)
-(setq which-key-idle-delay 0.5)
-(which-key-mode)
-
-
-;; GENERAL KEY MAP
-(straight-use-package 'general)
-(general-evil-setup t)
-(general-create-definer ju/leader-key-def
-			:keymaps '(normal insert visual emacs)
-			:prefix "SPC"
-			:global-prefix "C-SPC")
-
-(ju/leader-key-def
-  "." 'find-file
-  ;; Buffer
-  "b" '(:ignore t :which-key "buffer handling")
-  "b b" '(ibuffer :which-key "IBuffer")
-  "b k" '(kill-current-buffer :which-key "Kill current buffer")
-  "b n" '(next-buffer :which-key "Next buffer")
-  "b p" '(previous-buffer :which-key "Previous buffer")
-  "b B" '(ibuffer-list-buffers :which-key "IBuffer List Buffers")
-  "b K" '(kill-buffer :which-key "IBuffer Kill Buffers")
-  ;; Eshell
-  "e" '(:ignore t :which-key "eshell")
-  "e h" '(counsel-esh-history :which "Kill history")
-  "e s" '(eshell :which "run eshell")
-  ;; Workspace
-  ;; Counsel
-  "f" '(:ignore t :which-key "file op.")
-  "f r" '(consult-recent-file :which-key "Recent files")
-  "f R" '(revert-buffer :which-key "Revert Buffer")
-  "t t" '(toggle-truncate-lines :which-key "Toggle truncate lines")
-  ;; Shortcut
-  "f d d" '(lambda () (interactive) (find-file (expand-file-name "~/.emacs.rational.d/desktop.el")) :which-key "open exwm config")
-  "f d e" '(lambda () (interactive) (find-file (expand-file-name "~/.emacs.rational.d/config.el")) :which-key "open emacs config"))
-
-
-(global-set-key (kbd "<escape>") 'keyboard-escape-quit)
-(global-unset-key (kbd "C-j"))
-(global-unset-key (kbd "C-k"))
-(global-unset-key (kbd "S-SPC"))    ;; use only S-\
-
-
-;; tramp default is scp
-(setq tramp-default-method "ssh")
-
-(straight-use-package 'flycheck)
-(global-flycheck-mode t)
-
-
-;;(straight-use-package 'vertico-posframe)
-;;(setq vertico-posframe-parameters
-;;      `((left-fringe . 8)
-;;	(right-fringe . 8) (alpha . 100)))
-;;(vertico-posframe-mode 1)
-
-
-;; TODO
-(straight-use-package 'hl-todo)
-(setq hl-todo-highlight-punctuation ":"
-      hl-todo-keyword-faces
-      `(;; For things that need to be done, just not today.
-	("TODO" warning bold)
-	;; For problems that will become bigger problems later if not
-	;; fixed ASAP.
-	("FIXME" error bold)
-	;; For tidbits that are unconventional and not intended uses of the
-	;; constituent parts, and may break in a future update.
-	("HACK" font-lock-constant-face bold)
-	;; For things that were done hastily and/or hasn't been thoroughly
-	;; tested. It may not even be necessary!
-	("REVIEW" font-lock-keyword-face bold)
-	;; For especially important gotchas with a given implementation,
-	;; directed at another user other than the author.
-	("NOTE" success bold)
-	;; For things that just gotta go and will soon be gone.
-	("DEPRECATED" font-lock-doc-face bold)
-	;; For a known bug that needs a workaround
-	("BUG" error bold)
-	;; For warning about a problematic or misguiding code
-	("XXX" font-lock-constant-face bold)))
-(global-hl-todo-mode)
-
-;; ORG Mode
-(setq org-todo-keywords
-      '((sequence "TODO(t)" "HOLD(h)" "|" "KILL(k)" "DONE(d)")))
-(setq org-ellipsis " ▾")
-(setq org-hide-emphasis-markers t)
-(setq org-src-fontify-natively t)
-(setq org-fontify-quote-and-verse-blocks t)
-
-(setq org-agenda-start-with-log-mode t)
-(setq org-log-done 'time)
-(setq org-log-into-drawer t)
-(add-hook 'org-mode-hook (lambda () (org-indent-mode)))
-
-;;(straight-use-package 'org-superstar)
-;;(add-hook 'org-mode-hook (lambda () (org-superstar-mode 1)))
-(straight-use-package 'org-attach-screenshot)
-(straight-use-package 'org-download)