Club 10 layshaft bearings

[Danf1275]

I've nearly finished my club 10 rebuild, but have drawn a bit of a blank with layshaft bearings. I wanted to upgrade from bushes to ballraces.

Diff bearings were taken from my Procat spares stash, but internal diameter of layshaft oilite bushes are much smaller than Procat equivalents.

Do standard, full fat, Cougars have a different shaft, or are different ballraces used?

Thanks in advance for any info you chaps can give me.