It’s not that hard but you need a few sacrifices if you build a safe car. I was in that area but I went back to steel doors with wind up windows. I would love to have a 40-50 pound lighter driver so I’m going to work on that soon.
Well I can see a good cage installed is a weight draw back but a worthy one that won’t be skipped. Fiberglass doors are possibly on the list. I’m not so sure how far down the rabbit hole I’m going.
