2 Speed Transmission Suggestions

[burkey_turkey]

Hey all, our team just voted today to try out using a 2 speed transmission. While we always have the option of buying one from andymark, we thought it would be neat to try and design one ourselves. I've been looking around chief delphi all night at different desings, and i was hoping for some more input. I understand the basic concepts behind the duel speed transmissions, but i dont understand all the pros and cons between the differet types. This is what ive got so far:

Mash:
easier to build, but the teeth of the gears are more likely to break during transfer - how can you solve this problem?

Dog:
less likely to break, harder to manufacture. we may or may not have access to any advanced machines to build this thing, just a nice drill press and a band saw, but dont worry, we are commited to making this happen.

i know there are more methods, but for only 2 speeds, they didnt seem very good. if im wrong, please enlighten me

thanks for all the input i know the CD community will give.