hey john, your gt is still with my mate, he just moved back to watford.
The bloody thing was rotten from the inside out, although it looked perfect. just replaced most of the floor, one of the sills, both inside rear arches.
we just kept finding more and more as we went along, wouldnt have bothered at all if we had known it was that bad to start with. was a big job.
Taken the best part of 5 weeks to do it over the weekends, but at least a nice gt still lives on. still need to put the carpets, seats, skirts, exhaust back on, and finally fix that dodgy letterbox vent that you did.