That's great advice Eric. And Zeus- that was really unlucky. Thank you both.

Yes, you are right about the airscrew. Don't know what I was thinking. Will twist it back. I have a feeling the coils are probably ok but thinking it might be an intermittent problem. Will do the test and see. Yes, I'm sure the stock pick ups are adequate- was thinking one of them might be faulty- but will try looking at the timing. Then I guess I'll just have to test whole loom.