Sorry for the delay in responding, life got in the way. It looks like I needed to move the jumper across to get it to work off the control panel. Not sure that the pot on the control panel is controlling the speed that well, I had set pd011=100, so the lowest speed was 6000rpm. ( not wanting to burn out the spindle)
The Gpenny spindle I have suggests that you run it for 30 mins to warm the bearings up every time you use it. As it’s going in a router table that’s not ideal. I only use a 3min ramp up on the CNC router ( HY spindle I think). I would have assumed both have packed bearings - anybody has any experience as lack of good technical data makes it hard to make an informed decision.