advice for selfrighting mechanisms

ok so been thinking about what and how im going to improve TS2 and im sticking with the same design and shape with 2 wheel drive with a few changes to the front end to make it a little more NST proof-although tbf it did stand up to the hits well. Just wana keep what works the same and simple! To be different and cause i fancy the challenge Im looking at making a self righter with an arm on it, 360 style kinda thing. I dont wana be doing any of this driving up side down as when up rite my robots lower half is well armoured in hardox leaving the top half of the sides weaker (just the nylon chassis if that makes sence. (will upload vid later ) ill have about 1 kg to play with in the new one so just wondered what the best way to go about making one was? Preferably using a drill motor, i like how james uses 1 to make the arms move on preditor and thought about that pushing an arm on a lever or something, anyone got any good pictures of any theyve made/designed?

Attach a drill motor to a threaded rod and essentially just make a basic lifter.

Glens is pretty good on deamon;

http://robowars.org/forum/viewtopic.php ... &start=465

basically 2 drill gearboxes in a housing to give a high ratio attached to an arm...simple and cheap, plus you could nock one up on the lathe at work easy...

Or you could buy one of the low geared banebots kits, with a spur gear onto an arm to get around 700:1 etc...

cheers dave thats exactly the kinda thing i was wanting. take up so little space in the robot too not having to have a large mechanism etc etc on the end of the motor n that, can use the 2 18v drill drives i had in the robot to make it too so won't cost me owt.

and yeah gary that was my first thought but i was hoping to make something that could be as small as possible and i think thats just about perfect!

What size gears would you use off the end of the drill? Thought about this idea myself as I have a spare drill for the crusher