You're not wrong! Well that's very strange.  I think the first time I was messing around with these, I hadn't yet created the conduit tube part and the besa box would stay stretched.

Don't suppose you know how to fix the 'take off as cut in' option do you?  It defaults to C1 and C2 which are the top and bottom connection points, so it doesn't recognise the size of the selected conduit or cut in correctly etc.

Thanks very much for the help so far!

Graham