What if a valley for the pinch weld is cut through them with a table saw?
They just aren't robust enough to support the sharp weight of the pinch weld. I used a dremmel on mine to form the bottom of the puck to the jack stand though, rather than cutting a groove for the pinch weld. If you cut a groove for the pinch weld and the majority of the weight ended up on the flat part of the puck on the inside of the pinch weld I think it would hold up OK with a jack, but IMO there is no way to make them work with standard V shaped jack stands, just not enough material to fill the V and allow for the pinch weld recess.
I still used the pucks for jacking up other cars with flat surface points like the rear diff on my friend's STI or my GF's G37, but our pinch welds seem to hold up fine to properly placed jack stands with nothing on top.