There's a few things to bear in mind of course, what suits one Robot may
not suit another, I'm assuming that the Team Katch robot has quite small wheels
and together with the wheelchair gearbox should not draw a lot of Amps-
Where as if you have big wheels and a ratio of say 3:1 and no gearbox
the speed controller may not handle the increased load.
Take into account the weight of a Robot too-is it 55kg or 110kg and
what sort of voltage are you putting in-lots of variables