I was welding up my newly fabricated floor boards (taking pains to skip around so as not get too much heat in one place), but I did anyway. Now my foot wells have a slight upwards bow and will "doink" when any weight is placed on them. I remember reading that you can remove panel tension by heating and quenching, I just don't remember which side of the panel is treated this way to achieve the desired countereffect. Logic tells me to work from under the floor to bow it back down, but I'm not sure. Anybody had any experience with this problem?