The controller should handle BOTH your 300w motors IF you can add a suitable heatsink.

I believe option d) would give you tank style steering.

The parts of the controller that need this heatsink are the Mosfets ( they get hotter as the amps draw rises ) ... they have their own small built in heatsink that will handle getting rid of the small ammount of heat generated @ 5 amps ......but need an additional heatsink to reach their continuos rating of 22 amps.

A heatsink is usually a aluminium block and more often than not it is finned.
Its aluminium because this conducts heat away efficiently and finned to increase the surface area and thus the cooling.


Paul Copper @ Technobots was hoping to supply such an item for the MD22....try E-mailing him.