Well, the end neareth. I have the bog in place on shims (3-5mm), ready to inject a load of silicone under it (it doesn't have a dead true base so needs something with give to sit on and a long time ago, here, there were a couple of people who said they'd bonded[1] bogs down rather than screwed - so what the hell, give it a try...)
[1] Car body filler was also mentioned, which would make for a solid job but I do want the option to get it out again *if* I ever need to...But, boy - isn't a small bathroom with tiles everywhere a *lot* of work. Totally underestimated who long this would take!
Nothing is *that* difficult - it is simply that *everything* demands an artist's touch or it will look bad.
Of course if I had built it Barratts style - ie painted plasterboard, 3 tiles over the sink, couple of rows around the bath and carpet, it *would* have been easier. And crap.