Cool thing done. Well I suppose that it's not that cool, but it will work and it can be removed later if I change car over to a streetcar without damaging the paint. If I had simply cut a slot in the bodywork then I would have to deal with a ugly slot in the body if I removed the tow ring later. AND how would I do that without a door? I have made a second door without a slot and I will paint them both and save the non tow ring one for later.
The tow ring is 6061 T6 1/4" Aluminium with a 2.25 inch diameter FIA reg size hole mounted with three 3/8 grade 8 cap screws and big washers on the inside behind nylocks. Very easy to remove. You could probably lift the car from it. Ive been towed on track and it VERY important to have a tow ring that will not fold up and damage the car or cause the tow line to rub the bodywork, damaging it.
You can see the foot-box access door and enlarged hole also. The little cover can be removed with one screw slid up and out of the way.
All of this is in keeping with my prime directive, Build it so you can fix it later. It also illustrates how one simple idea can turn into quite a bit of work when you stray from the "standard build"
And Rob, the firewall flange fit dead on.