Unfortunately they are not. Mouse motherboards are generally shaped like the mouse, i.e. right-handed, and the side buttons are on ribbon cables too short to move to the other side. Impossible to reorient without serious work.
Sounds like someone could buy a bunch of different mice and x-ray them to look for the easiest candidates. Looking for symmetrical-ish electronics, most of all.
Sounds like someone could buy a bunch of different mice and x-ray them to look for the easiest candidates. Looking for symmetrical-ish electronics, most of all.