No, it doesn't seem to cause any distortion in the worked areas, but as Jeff referred to... doing it right takes a pretty light touch/high volume of light hits in a small area.

If a person wailed on it too hard, or misused (overtightened, even by a tiny amount) one of the special roller-type tools out there for this purpose, that would cause some damage.

These particular ones were wavy in weird places. One had sort of a vertical low spot/wave issue about 3/4 of the way back, and both of them were
wavy a couple inches above the bottom seam, between the bottom and the character line. That might be why they were discounted/on sale?
While I'm pretty confident that my installation didn't cause any of the issues I had to correct (because the issues were too far away from the worked area), I can't actually guarantee it.
I'm not trained and these are the first I've done, so they are what they are. They're as good as I can make them.

Thanks Ted/mods for letting this stay in the race area for now.