I have caps remapped to crtl on press and esc on release, space mapped to alt on press and space on release and the two shift keys mapped to parens on release a

I have caps remapped to crtl on press and esc on release, space mapped to alt on press and space on release and the two shift keys mapped to parens on release and shifts on press. It's quite common to do at least of one of these if you're using vim or emacs on linux.