Bought SS dome nuts from 'Toolstation' for fixing exhaust pipes to the studs on the XT600E. Plenty of copper grease and they went on a treat, so hopefully I should be able to remove them for maintenance. Other bulk bags of SS fixings and threaded rod (replacement exhaust studs) are in stock and at reasonable prices. Not the same range and finishes as some of the online suppliers whom I use, but very handy, cheap and appear to be of good quality.
Bill