Wow, thanks for the replies. I didn't think anyone had. The electrical gremlin is, for the moment, solved. After the engine cut off last time (in the pissing rain in Sydney rush hour), I took it to an auto electrician. After a few hours, he called me and said that moisture got into the ECU and this was affecting the spark. I'm a bit perplexed to this moisture issue as this electrical fault has raised its head whether it was dry / wet or garaged / outside. Anyway, apparently fixed now.
RX7s are mad money, but so are most sports cars.RX7s are regularly in the $20,000 - $24,000 price range here, so that's approximately E14,000.
My car isn't as clean as I had thought when bought. She had a light smack to the front at one stage, so that explains the new, non factory front wings and the paint is starting to bubble on the bonnet showing the original red underneath. It must have been a pretty light smack as there doesn't seem to be any sign of damage in the engine bay, but I wouldn't know what I'm looking at.
Well, thanks again for the welcomes, I promise to post more here!