After rebuilding my R65 gearbox it turns out that I need a couple of shims. Motorworks selll them £11.00 each plus postage, I needed two ,0.1mm . I found a company in Worcester that supplies to engineering companies for £1.07 each plus postage. I’ve ordered six of assorted sizes,total including postage comes to £13.00. I’ll check them out and report back.
