Help please. I'm just putting the carbs back together in accordance with Brian Barnes' excellent guide, and I've got carbs 1 & 2 mounted.. I thought I'd taken photos from every conceivable angle to leave nothing unrecorded, but I have a piece of plastic that I can't find a home for and which doesn't appear in Brian's work or on any exploded view that I can find. Judging by the diameter of the hole, it goes somewhere on the throttle shaft, so before I go any further could someone please tell me exactly where and facing which way?