For those of us with machine tools, I wonder if a
roller can be "fine
tuned" to the proper diameter by fitting an oversize piece of
neoprene tubing to the roller, cooling the whole affair in dry ice,
then machining it (on a lathe) to the proper size. I can't recall
I believe it can, although cooling to liquid nitrogen temperatures is
recomend (if only beacuase it takes longer to warm up again, so you have
longer to take a cut).
I've also heard you _can_ machine 'rubbers' at room temperature, but that
the tools are totally different from those used for metal turning. May be
worth investigarting.
I've not tried either though.
-tony