Ok, ok.. I just couldn't shut up here. Brent is entirely correct. But here is my two cents:

If flying with your different hand was so difficult then why do flight instructors "get it' in about two or three hours? Train to it. Its not that diificult and will take less time to perfect than building a duplicate set of throttles. If you think that flying with the "usual" hand instead of the "other" hand is so critical to flight safety (saving a milliseceond or two) then you are probably up to your ass in alligators already and it will take both hands to bail yourself out. Jeff Edwards
LIVP #456
CFI