Well, at the w/end, after much putting-off and "shall-I or-shant-I?" thinking, I did it. It's done!
First point is that the manual is not quite DIY friendly, and assumes you are doing it in a workshop up on a ramp. You will need assistance, obviously in some aspects. To get any sort of access to remove the box you'll need ramps, and possibly (as I did) slacking off of the engine mounts to facilitate some kind of engine movement, essential when re-installing the 'box.
I also found it essential to remove the entire exhaust system, also you'll need space behind the box, so get rid of the whole rear propshaft. The only bugbear I found during the strip was the removal of the gearsticks (Might have been me, that.) and I had to grind off an exhaust bolt. The transfer unit was fairly light, I thought.
It's crucial to support the box with a something like a large jack when that final bracket is taken off - it quite literally fell away, not needing the usual clouts with a mallett to seperate bellhousing from engine. I did this with a large bottle jack and some timber blocks I shaped for the occasion.
Changing the plate, housing and thrust bearing holds no nasty surprises. I was surprised how much the pressure plate was worn - although the adjuster was not quite at the end of the drag, I'd doubt there'd be any plate left when you turned it to the end of the stop - I reckon this must be to do with heavier drivelines, and those who say 75-80k for a clutch are not far out.
Putting the 'box back was NEARLY as awful as I thought - I was glad I loosened the engine, as i was able to twist it back (again with bottle jack) in order to line it up. Also it was a bit lazy going back onto the input shaft, so had to be pulled in with the securing bolts. I also took the oppotunity to grease those otherwise inaccesible propshaft nipples.
All in all, inc. fag and tea breaks, it took 5 hrs from first driving up the ramp till the test drive. It's hard work I will admit, but the task is straightforward enough, no special tools are needed, I've saved over Ã‚Â£350+ at dealer prices, and the beer and fag after were the most satisfying I've had for a long time!