Cheers guys really look forward to seeing some pictures and confirming that rear hole!
Wombat did you fix studs underneath? it would be good to see what anybody has done with their fixings underneath in addition to those linked above!
I measured and marked everything out as you suggested t0m0
I then had an idea to double check everything hopfully this may help anybody else doing this as an addition to t0m0's guide I will add some more when finished
I had placed masking tape on the sills with double sided foam tape on top but left the top layer in place so the top side did not stick, this was in line with the clips
I then offered up the skirts in their correct location and firmly pushed where the clips are, I was hoping I would see an outline of the clip part but they are slightly recessed so it didn't mark but it did mark the solid top and bottom ridge that runs horizontally along the skirts
I used the marks to confirm my previous measurements all ok!
I then marked the extremes of position of the clips in the skirts then marked the centres of these (so there was some leeway of alignment if needed)
I then taped some matches on these lines, offered up the skirts again pressing firmly and this time leaving a vertical indentation! These were now my reference points I measured again and again and I could not seem to get any better accuracy any other way so I settled with the now cross marks
Then following t0m0's guide centre dot drilled hoovered etc.
I have then de-burred and painted with epoxy 121 getting loads inside and hopefully all around
I will apply cavity wax once the epoxy has cured fully
Skirts have been temporarily fitted (before epoxy) but only with a couple of clips on each one all ok so far and the location for the studs have been marked still undecided wether to captive nut or weld
That's where I'm upto so far just need to do the rear holes and the bottom studs and im done, hopfully soon!