I'm already running the light motor.
Thought I'd have a play with throttle speed on the trasmitter, but turns out my 3GR doesn't have it
, so played about a bit more with the slipper, pretty sure I did have it too tight, the grass I'd tested it on was no where near as grippy as the astro track, got a good few feet of slip now, I'll see if that feels a little easier, then look at the other stuff. Thanks for the advice.