Crank and block now at Bradbury Engineering - I'm optimistic they seem to know there stuff. Good range of machine tools and engines in process. They specialise in older engines! Including pre war motors where they can re make (cast and machine) new white metal bearings. Looks like my crank is recoverable - but might be on its last regrind. Block will be machined to suit Burtons +0.110" pistons as it's currently on +0.090".