PM sent for the A4000. Might end up being a local sale too :-)
BTW: just caught the "backwards resistors have been replaced" bit. Resistors are not normally polarised. Do you mean diodes or capacitors? Was there a known issue with 3640 boards at one time?
Ah yes, I quick 'yahoo search' reveals some electrolytic caps were installed backwards, causing their acidic juices to leak out. Much like an old battery.
