Nice job! I am in for those braces too. I didn't know the mounting holes went all the way through the floor. Sounds secure. My car is very flexy with the hardtop off. I love top down driving but what a difference my hardtop makes to stiffness. So, I tend to keep my top on. I keep things stiff too - I've become tired of changing the shock setting and can't wait for something STIFF. the roll bar wil help too.