I have just finished repairing a controller board for an X2 and I'm looking for adjustment procedures for the overload and speed control circuitry. I have the prints for the boards but no adjustment info. I have a feel for what the speed control pots do from looking at the scope and listening to the motor but there has to be a proper way to check these. I had to replace both op-amps on the daughter board so I'm sure things are off a bit, thanks !