Thanks jim, I wish it was that simple. I know about the motor tuning. This is an odd one, it only seems to happen once I have edited the .set files.
From there on, I just cannot get the g0 to go at high speed. The g0 will be exactly the same speed as the FRO. Toggling the Rapid overide don't work, checking and unchecking the "FRO persist " in the general config menu has no effect, entering speeds in the "Rapid overide" DRO has no effect. Seems Like I will have to do a Sherlock Holmes on this one.
William