Here is the xmodmap I use in Linux:

  remove Lock = Caps_Lock
  clear Lock
  keysym  Caps_Lock =    Control_L  BackSpace  Escape  BackSpace
  add Control = Control_L

I've been playing with KR4MB and set Control_L to Control_L (+ When you type Control_L only, send Delete) + [KeyRepeat]

This is causing some angst, as I've discovered I sometimes tend to hold down the CapsLock key before hitting another key. It's long enough for multiple deletes to be sent to an application (eg using Vrome in Chrome).

Shift_R has been remapped to <Esc>.