but the chances of the roof collapsing would only be if you fully rolled the car at some speed.
Well if you're going to, you may as well do it in style
and if you are happy with your stock belts then thats fine, in my opinion, getting proper bucket seats would be much better for holding you in place.
True, that's why I have a set of Corbeaus to be fitted but that's also why I bought harnesses as I wanted to be extra secure, but pro's and cons to both. Harnesses aren't any good for Sandra either now she's got a bun in the oven