Cheers guys!
Had a bit of a nightmare today so progress has been slow.
Basically, the back end of the sill assembly wouldn't fit even close to where it was supposed to go. The captive nut set brace for the subframe trunnion was stopping the assembly moving to where it needed to go.
As a result, with the inner sill hard up against it inside the companion bin, the outer sill lip was about 15mm shy of meeting the quarter panel lip which could have spelt disaster.
I spent a lot of time today going over everything on the whole car with a measuring tape to make sure everything was with in tolerance.
I then compared the measurements with another Mini and i just couldn't find anything wrong apart from a 2mm discrepancy on the heelboard which is within tolerance.
I even went as far as bushing up the new subframe to measure the distance between the front mounts in case the worn bushes on the old subframe had lead to the subframe mounts being put in the wrong place.
again, everything was fine.
I spent more time scratching my head wondering what it could be, i had a second opinion and nothing untoward was found.
Thankfully in the end, it turned out to be something simple. The previous repair on that side of the car hadn't just been a new inner and outer sill but the nut brace for the subframe mount had been cut off and the re-welded 5mm over and welded on at twisted angle which was stopping the inner sill from moving over.
I can only imagine that this was done to fit the sill which must have been in the wrong place all along.
The captive nut's them selves were thankfully in the correct place so no need for any action there, i just needed to modify the nut brace.
Phew!!
Anyway, here is the little amount of progress that was achieved after that kerfuffle
I cleaned back the stonechip from the flitch to see it's condition
This side is solid but there are just some rough seem welds to unpick
Then was the long drawn out process of removing the remains of the old inner sill from the step lip top and bottom and then i chipped away the sound deadening ready for cutting in of the new panel
And after all the trouble with getting the inner sill to fit right, it finally did.
Tomorrow, i shall 'cut in' the new panel and get it welded.
Nearly ready for paint now!
Ben