[code_biologist]

^^^ you mean ctrl-a and ctrl-e? But yes, +100 to the caps lock → ctrl remapping. Trivial to do in the keyboard "modifier keys" setting, and makes emacs text movement extra fast.

[jamesvandyne]

That's the one. Thanks for the correction. Forgot my keyboard, which has a ctrl key in place of the caps, so I've stopped mapping it.