Thanks Roger,
necessity is the mother of invention and all that
Hardly complicated and as usual functionality wins out over aesthetics but it does the job intended. Made easier as usual by the hints and tips offered here. I would have been floundering around with more trials and errors otherwise.
A quick shout out for the supplier of those bearings
https://shop.hpceurope.com/an/. Based over here and still open. Seem to have a good selection of engineering stuff. Bi-lingual website too.
I do not think therefore I do not am.
cheers
Andy