Thanks Kman and RC
and yeah, I saw that video on youtube after I'd bought the kerdi supplies, which made me determined that if they could do it, then so could I. It was their application of the kerdi on the curb that I sort of copied, although I don't recall if they used as much kerdi fix as I did.
I'm not going to kid you - this project took a really long time, much longer than I'd expected - basically 4 day weekends since the end of January - and I spent a great deal of time between phases, standing and staring at the mess I'd started, trying to run through every conceivable problem that I might encounter, so I'd know what to do when and if I did encounter it. I bought an inexpensive tile saw that they assured me would do the trick, but was a piece of crap, so I ended up borrowing a professional one from my brother-in-law, which made all the difference in the world. It took me an entire afternoon to lay the tiles on shower base and another day to cut and lay the curb tiles. Just goes to show that a little confidence, a lot of determination and patience as well as a husband who closed his eyes to the shambles the rest of the house was in for well over a month will get you. The end product is something I'm really proud of (not to mention the plastering, flooring, finish plumbing etc. that I took on). The only thing I didn't do was build the floating vanity (I designed it, and had it built/installed).
So, thanks RC - and for what it's worth, you words of warning only made me more determined to do it right!