Thanks Bird but i don't think its a polar alignment issue . But I think Robby maybe onto something with the 2 phasing idea .
I could hear that the RA motor wasn't making an even ticking sound but now and then ( as you say ) dropping out or slowing down.
Should I do a motor swap ( I think I've tried that in the past though ) or do I need a new motor.
Thanks again everyone
Zane