wanted rr to read this thread !!!!!!!!!!
....Sorry to miss this thread, Ian.
I don't have any direct experience myself of using spacers but one or two or three extremely experienced car builders I know have advised me against it. Using spacers doesn't guarantee you'll have a problem, but there's clearly a degree of risk.
Only 2,000 miles is insufficient to prove them being trouble-free. Ben's 30k miles is much more realistic as a test.
For what it's worth, my advice is never to do such a mod just for looks but to only do it for very good functional reasons and take advice from a professional rather than a guy on an internet car forum (me included!).