Ive emailed him now thank RC46.

While I'm here, during fitting new rings and crank seals to the 300 motor I found the center bearing isn't quite as good as I would like (though it still feels near perfect when spun by hand) for an engine I'm selling so I think the 300 kit will be sold less bottom end now. Just waiting on a couple of guys to get back to me on which bits they want.
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If I have to take the carbs off once more...