It's strange @Dinky, you'd have thought that because Hornby/Airfix now own Pocher, they'd have got their act together re the instructions. Because I inadvertently damaged a couple of pieces (due to the instructions being incorrect and, dare I say it, a bit of clumsiness), I called up the Hornby spares department today. The good news is that they didn't have any issues with asking for replacement parts, although there's a long wait post-Christmas; the bad is that they had no idea the instructions were so lacking, so not sure if that will change in the foreseeable future.
I've been building Airfix kits for the best part of 45 years now, so have masses of experience there, but this is in a league of its own given the incorrect sequencing, wrong part numbers, lack of detail, etc. However, as I say, as long as everything is "dry" fitted first, screws loosened in their holes prior to fitting, etc, then it's definitely doable - the actual parts are of a very high standard, the casting is accurate and they fit together extremely well - no lining up issues as yet (touchwood) - and the paintwork is superb. And, as you say, it will look so sweet, even the wife won't complain (not so much, anyway).
Also ordered the display case, seems like an even longer wait there, but definitely worth the additional expense.