Thanks Charlie,
Although after reading the RT88's specs, I'm not sure they can be setup to move that way ?
It appears they are either one way, or flick the switch & they jump 180d the other direction.
Maybe I would need digital retract servos to achieve that ?
I'll have a play around with them. Would look nice to have them operating at a scale speed.
I have one of those cheapy Turnigy 9x radios running er9x software that allows control over servo speed. Even one gear before the other etc.
A lot of Tx for the price. I have a FrSky module in it now and lots of mods inc telemetry, LiFi battey etc.