And more recently have obtained some offcuts
of 40mm nylon round rod from a local engineering
works.

"Airy R. Bean" wrote in message
...
I'm now well on the way to repairing the 5/8ths where I had to
engage in destructive test - I've been given a large sheet of
Paxolin/Tufnol which is 7/8ths of an inch thick, so 3 thicknesses
of that araldited together and turned down should do the
trick.