It actually wouldn't be hard. Just add a 2A brushed speed controller into each motor lead and control them from a separate channel for the transit speed.
Problem is you would probably have to build the controller since the only commercially available 2A brushed controllers I know about these days are built into the UM receiver bricks.
Pretty simple device though.
Originally Posted by Brianlon
Did not expect replies as fast as that lads!
I will give it a go as soon as I can and report back with the results.
I do see your point regarding the fact they just travel from point to point, where as a servo goes where its told.
Would be a nice feature if manufactures fitted speed pots to the actual undercarriage themselves so you could dial in a speed on them. One for up and one for down.
mmmmmmm.... my patent! lol