Update all. After extensive trouble shooting it turns out one cap leaked so badly it actually damaged through multiple layers of the Pcb. And despite replacing all caps and even attempting to repair the multi layer damage, i get an error code 31 when putting the ECU back in the car. So the car starts, and runs but runs really rough. I have tried to rebuild traces with copper and checked wiring at the ECU too but still get the error 31 ECU code. I successfully repaired the traction ECU, no problems with that as it tested OK in a friend's Auto TT, but sadly appears the ECU is a write off. FYI, removing the caps accelerated the damage to the eyelet hole but that was inevitable anyway as the components and PCB seemed to crumble away.