Will stock 1200 strut tops fit on top of stanza struts as is, or is the centre hole a little different? (just trying to plan ahead whether we'd be lucky enough to truly have a sort of one size fits all solution, or there will have to be a few small changes for each combo, but still relatively all the same...

Do you happen to have stanza struts waiting in the wings?

I've got another pair (beside those on the car) of totally stock early 1200 ones I got from Heath Bruce (entire struts - tops springs the lot. So I'm going to use that to determine if they'll fit on that side of things, and then the blue shell to double check their fit into the strut towers. I'm doing what I can to make it happen this week, but I might get delayed till next week, as I've still got to finish the seat rail stuff, which has hit a small (but surmountable) obstacle.