there will be many small parts that turn out to be better replaced while you are there
Hmmm. It's taken me about 2 years! I have cleaned/repaired/repainted/rebuilt most of the parts in the process, however. MoT test next week...Agreed, at 36 hours its best part of £2000 labour, but getting a few mates, plenty of beers and blitzing the worst of it makes a lot more sense. There a video on youtube of a S3 chassis change in under 24 hours - OK its 4 guys and mid-summer Scandinavia but it shows what can be done.
Floor plate and tunnel can all be removed and just refitted with a couple of bolts.
Sounds familiar...makes a simple job take a lot longer than it should. But as @Blackburn says, if you're going for a speed record, that's the kind of thing you need to resolve before you start the timer.I thought the same before I did mine, but it was actually a lot more difficult. I found that the floor and tunnel screws were often rusted into the clips. The originals were slotted for a screwdriver, which would often slip out of the slot before actually turning the screw head. This seemed worse the more rusted the heads were as the screwdriver slots were not made very deep.
Things like that are removed with an angle grinder and replaces with new on refitting. The only ones you cannot do that with on a bulkhead change are the wing to bulkhead bolts, and the wing to front panel bolts. Everything else is cut off and replaced, and if it is not load bearing replaced with stainless so you do not have the same issue next time.I thought the same before I did mine, but it was actually a lot more difficult. I found that the floor and tunnel screws were often rusted into the clips. The originals were slotted for a screwdriver, which would often slip out of the slot before actually turning the screw head. This seemed worse the more rusted the heads were as the screwdriver slots were not made very deep.
Wrench the floor screws out. .Buy all the floor screws new (they don't cost much) and a big box off assorted spire nuts off e-bay. The worst ones are at the front and that's going in the bin as its part of the bulkhead. You'll need to hammer the flange flat and fit new spire nuts anyway. Don't waste time re-using the floor screws, holes could be anything up to 1/2" off when you start pulling it into place and only new fixings will cope. I used the old hex head ones to pull it together then swapped one at a time for the new slotted heads. A big pry bar really helps. After a coupe of years took the floor out last week to do the hand brake - all the holes lined up no force, must have "settled".
Things like that are removed with an angle grinder and replaces with new on refitting. The only ones you cannot do that with on a bulkhead change are the wing to bulkhead bolts, and the wing to front panel bolts. Everything else is cut off and replaced, and if it is not load bearing replaced with stainless so you do not have the same issue next time.