Not that expensive, probably about $2.00 for what you need. but you would need to build a programmer too. (not that expensive if you build a JDM) If you ever get interested in PICs http://members.cox.net/sonjarob/TUTs/uP4Idiots.html is a good tutorial. BTW the mechanism looks good. Are you going to have it kind of spring to between 3rd and 4th like the knobs kind of do in cars?