I have this but it scratches the hell out of the paint on the pinch weld. I switched to just using a normal competition style hockey puck. It can flex and grab the pinch weld without scratching it up. As far as jack stands on the pinch weld you can, I've done it. If you can lift the car from there you can also support it from there as well.
You're doing it wrong.
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Realistically you can use a jack stand pretty much anywhere on the pinch weld as long as you aren't trying to support the weight of an entire side of the car. Use a cloth or something to not mess up the paint though. The logic being that the weld fits snugly in the little notch in the jackstand. If you look at how the pinch weld is reinforced at the little arrow pointer sections, it carries a decent distance fore and aft of the arrows. As above, if you can lift the car there, you can support it as well. Using the inboard control arm mounts is another good spot.I have jacking rails too, but even the 'full length light-weight' Steedas don't get far enough to the rear. They go over the front 'arrow', which is pretty far back, but don't get all the way to where the chart shows it. In addition, the jacking rails are super smooth, which I don't like, since there's absolutely nothing preventing the jack or stand from moving. This is bad with a jack, since the jack moves quite a bit while lifting the vehicle, meaning it might slide off the rails. It's going to be interesting to try them
