Well, I've got to the first point of no return! I'm doing this entire project one wing at a time, the idea is that I reduce the time that the car is off the road to an absolute minimum - but having said that , I'm in no rush. slow and steady is the name of the game.
I've started with the rear nearside (passenger side) wing, on the basis that (a) the rears are much easier to do than the fronts, and (b) I'll get better as I go along so if the passenger side isn't perfect at least I won't have to look at it every time I get in the car

First job, getting the wing off, was dead easy, I had that done last weekend, but what with work and a bout of man-flu I didn't do anything more until today.

The old wings were cut far too tight, the tyre sticks out about 7mm further than the wing, so I'm going to cut the new wings with an extra 12mm of width

So I spent the morning checking, double-checking, measuring the old wing

and marking up the new wing:

Next job is to bung a diamond disc into my mini angle grinder and trim the wing down to size - but I need to do that outside to stop the dust going everywhere, so that 's probably it until tomorrow...