I had the mystery no start issue a few months back and tried to sort it out myself, and then with a local garage (i.e. re-solder, crankshaft sensor, new battery etc). The problem still persisted, so I sent the RCM (from the UK) over to Tighed1 and he checked everything, replaced some bits and so far, no more problems. I think he is in your part of the country, so it should be easy to arrange and he has done a load of them.