Comment by porridgeraisin

I have been using this for a while and it's great. Here's my config

  [main]
  # Maps capslock to escape when pressed and control when held.
  capslock = overload(control, esc)
  # Maps left meta to alt+f1 when tapped alone for start menu
  leftmeta = overload(meta, macro(A-f1))

  # Makes a shift layer
  [shift]
  leftshift = capslock
  rightshift = capslock
  # i.e, when some shift is pressed down, the other   shift being pressed will yield a capslock.
  # So, press lshift+rshift for capslock