Multiple Motors

[phrontist]

So what are the various schemes for using multiple motors to drive your robot? Specifically using the drill motor's and chiapuas together to get better torque/speed. I am asking because my team intends to use this design as part of our tranny next year. Is it possible to add another gearbox that shifts between the two motors, or do you just gear the chia down? I'm really confused and I'd like to hear a comparison between the various approaches, and what everyone think's is the best. I'm also asking because I want to create the FIRSTwiki entry for multiple motor drivetrains (though I'd be delighted if someone more knowledgeable stepped up to do it, or any FIRSTwiki entry for that matter.)