It does now Starkler
Adjusted the secondary and removed the primary to mark the centre. Tight as a ducks bum, but got it out eventually. Can now see the whole mirror. The barlow lens (thought it might be summat like that) can be unscrewed easily so might make things easier for setting up when the cheshire arrives. Its specified as a 700/1400 focal, think the barlow extends it to the higher figure but might also be the reason the field of view in the supplied 6.5mm EP is so narrow. Will give it a test tonight with and without the barlow. Thanks guys
Glenhuon