The chat here reminds me of when I was a young lad in the early 60s. Each summer I would make a trip to Armoury Road to get bits for my home built RGS lookalike. The BSA people were so friendly and helpful. One time I had had a D/S main outer move in the case and I took it along. They gave me a matching pair of new cases, stamped with my old numbers (and no ERS stamping) for the price of a crankcase half. It was so easy to keep a BSA in 100% trim on those days. Their replacement crank service, regrind and all shells, cost £4 15s. Often I'd go to Eddie Dows, who was only a bit north of Birmingham, and get some of his drool kit. Good times!