Hi there, have a problem with my V8. Was gifted a V8 due to both brush heads not spinning. Unit is in immaculate condition and main motor spins fine at both speeds. Replaced battery with fresh Dyson brand. Completely tore down unit for testing. With trigger depressed, I get 20.6V from brush connectors on motor PCB, end of bin, and end of wand so it's not an open circuit anywhere. Bench testing both heads on power supply, both brush heads spin so it's not bad heads. Accessed a brand new V8 for testing and my brush heads spin, so it's my V8 PCB that's the issue. PCB looks fine no obvious signs of damage. However I should not be getting 20.6V from the brush terminals without a head attached, correct? Brush heads are rated for 16.2V. I moved brush wires over to main lugs and both brush heads spin fine, although VERY fast due to the increased voltage. Perhaps an IC for the brush head supply is faulty and only remedy is to replace the motor/PCB. Should I mod the unit to give brush heads power from main lugs and call it good? What do we think?