I actually built a machine years ago similar to the Apple ultimate tune machine. I can draw the bow and check draw force curves, measure static nock travel, etc...

One thing that it allows me to do is look at the cams at different points in the draw cycle. My Bowtech Defender is not twisting because of the draw stop. And, I can assure you that the bottom limb has no twist or lean in it. All bows have some degree of twist or lean. I just have never owned one with as much as I am seeing on my Defender.

At the bowshop, we did just eyeball the other bows at full draw, so other factors could be coming into play.