[jkelleyrtp]

Very nice, I've been researching good plastics for gearboxes and found that acetal and thick polycarb will work fine, but polycarb does have more flex in it. I'd recommend some sort of bracing/stand for the cims to hold them in place during load (as said above).

Also, 254 has made a plastic-based gearbox and made their mounting frames out of acetal.