apart from that ...... ::)
A lot of speed controllers used in motor cars have a braking facility built into them - so that when you come from full-ahead to go to reverse - it pulses reverse to stop the wheels first and then moments later, reverse kicks in. But, yet again, on some of them you do not get full reverse you only get half of the speed in reverse as you do in full forward - plus the fact - motors in cars are thirsty little beasts
so a lot of the speed controllers have big 'heat-sinks' on them. Or, they have to be fastened to a metal chassis to absorb some of the heat.
on the Marine speed controllers....you should get full forward speed; neutral; and then full reverse; same speeds either way....some of them are water proofed and are sealed units; a lot like some of MTroniks but, and this
IS ONLY MY OPINION with sealed units, if anything does go wrong with them - there is not a lot one can do with them, apart from putting them in the wpb.
aye
john e
bluebird