Useful to know that there is a source for Suncorite that is readily available in the UK.
Well, made a little progress on that Mk3 in the pics, though not as much as I would have liked. Weather, wife's plans & so on..... At least I now have the grat block strung & in position, shoes, springs & clicker plungers fitted, & the R & D turrets 'rough' fitted. Everything seems to click when it is supposed to, & the sliding scales slide ok with the tip of a round inserted into the little 'diddy' on the scale.
I stripped two No53's to find donor lenses, only to find that one ocular lens doublet has partially separated, & that the ocular cell in the other is such a sloppy fit in both scope tubes that I am rebuilding that the whole set of lenses are unusable, at least in either of these two scopes. I now have a third No53 apart, & things seem to fit........so far! (The separated lenses I can re-cement with CanadaBalsam, but it takes weeks to dry, so they'll be ok to use in the longer term).
I'm afraid I'm not the tidiest of workers as can be seen from my 'restoration bench' (aka the dining room table). My wife's face is a picture.........