Tom, how did you do the bores on your rings? Individually, line-bored in situ, reamed or lapped? Just curious. I do like the choice of the 30mm tube too.
I bore them with the caps on in the same set-up. I may check the fit on the tube with some Prussian blue and if necessary take a thou or two off the parting surfaces and lap them. Although I suspect that won't be necessary.
