Now that the sleeve drive crank is being made, we need the bearings to accurately size the component. The large diameter bearing is an American made imperial bearing, only available from a specialist importer.

I mailed them and duly received a quotation for £326. Plus VAT. Plus £10 postage. Total price £400.

How much? Feck me!

So, plan B. A quick search around the web showed no metric equivalent bearings, but a couple that were close. After marking those dimensions on the plans with Bob, we found an alternative that will work. Press a couple of buttons on my phone and it’s in the post.

£142 delivered. Result!!