Featherweight Database

[RogueTwoRobots]

I've found that, I've bought 2 and one had plastic gears and one had metal gears

Just swap one set of plastic gears with a set of metal gears and you'll have two motors each with a combination of metal and plastic gears, thus balancing them out rather than having one stronger and one weaker drive motor. Standard drills tend to come like this anyway; the metal stage is the one closest to the output shaft, and the plastic stage engages with the motor pinion.

[Leonardomayo]

Where would I get said gears? I'm quite tempted just to buy 4 from robochallenge to cut out the hassle.

[RogueTwoRobots]

From your existing drills. If you've got one with metal gears and one with plastic gears, that's six individual metal and six individual plastic gears you have. A standard drill gearbox needs six to run so use three plastic and three metal gears in one drill gearbox and use the remaining ones in the other drill gearbox. Voila

[Leonardomayo]

I like your thinking, i'll butcher them further tommorow.

[mattsdragons]

Name: ReAvenger
Power: x2 9.6v 3300 mAh nimh batteries
Drive: 12V argos drill motors on 10cm blue wheels.
Weapon: a set of linear actuator driven claws with that also running off the 2 9.6V batteries
Control: Electronize 15a esc's with 25a fuses
Armour: 8-10mm HDPE top and base & 5mm checkered steel sides