I removed the tunnel cover to look at the quick shift end but it all looks good . Next took the bung out of the gearbox and drained the oil for inspection and put it through a gauze but it was as clean as a whistle , absolutely no residue whatsoever , no nasty bronze filings etc. Unless a ring has cracked but just not worn into filings yet , it seems a possibility that the selector has come adrift partially , pin poking out a little . All gears can be slickly selected without effort with engine running or not. Anyway , I removed the dashtop to try accessing the gearbox lid from there but I'd never get a drill under the windscreen to get the rivets out of the ally cover and even if I could , there's no way to get hands down there to do anything with the selector pin --- if that's the problem.
So I'm stuffed --- it's an engine out job just to look at the damn box --- ugh

Refunds for the sprint run out by the 20th April and there's not a chance of me making that even if the box went straight back in after minor repairs , too many other commitments this month and next.
That being so , I won't be doing any motorsport till June is my guess
