Those are some pretty nice frame jigs you folks have made. The shop doing the work on my GTX made a jig to hold my car so it's not tying up one of the frame racks at the shop for months on end. It's not as elaborate as some of these jigs, but it's more than adequate.

It's squared and leveled with the floor with adjustable feet and clamped at the rocker pinch welds. The uprights locate the front and rear frame rails and the rear tail light panel. He's using a Chief laser measuring system which maps out all the measuring points on the frame. I printed out the page in the shop manual that had the frame specs for him, but I'll have to ask him if the Chief aligner had the specs in the software as well.