[f5fstop]

Sorry, I'm on the conservative side, I won't say it is safe or not. I really have no idea what you did, what you used for a bracket, what you used to retain the rear of the seat when you deleted the use of the pins. To be honest, I would not comment if you gave me all the specs and engineering drawings.
I never commented in your original thread, but had to laugh when someone said it is no problem (guess they have tested this mod already in a high speed crash).

I can say I would hope your home-made bracket in the front will hot the seat in place in a head on collision at 35 mph, it won't buckle forward, it won't pivot. I can say I hope that whatever you used to pin the rear of the seat will also hold up to prevent the entire seat assembly from pivoting forward in a head on. I will say I hope you never have to find out.

Sorry if I seem harsh, but when it comes to safety matters, I will not comment, unless to say remember GM pays millions to crash test these vehicles, let alone millions to simulate the testing on high speed computers.

I have to admit it is a shame these seats don't fit all people; not sure if there is a way to resolve that or not. (I do know there are many cars tall people can't drive comfortably - Saturn SKY for one).
Maybe I will mention it at work someday. We do offer seat belt extenders for the obese who require the extender to allow the seat belt to fit, maybe GM should look at some type of seat height raiser that the dealer could install.