Thanks for your interest, as yet have not managed to get back to the "car" to get deeper into the diagnosis, cant say i am looking forward to it as it is in a housing estate car park, kneeling down to code read it the other day i looked like i was performing some sort of religous meditation, didnt dare lean too hard on anything for fear of it snapping and as has already been suggested access to components is somewhat strained, spending this weekend training a troupe of earwigs to carry the spanners, planning to go back on monday so will post a fix, but only after ive taught the insects to speak english so the can tell me what they did to fix it.