Your welding skills are exceptional! Mine are limited to squat racks, dirtbikes and toys for my kids!
That said I spoke to the fellas at Sports Car World/Regogo yesterday afternoon. Wow. They seem to be pretty well respected and know what they're doing. After some research I was surprised that your list was the first time I had heard of them. Seems they have quite the resume and have done some tank replacement recently as well. I'll chat with them early next week when their Esprit guy gets back from Watkins Glen to talk logistics.
Thanks again and I'll post up with progress!