Mr. Armo you might win this bet.
Here is picture of my P-07 magwell. There is bump inside at the mag release level. You can see scratch lines on the wall under the bump. I assume that the wider mags are getting little tight on the bump. Maybe that bump is there for reason???
Second: I do not know if somebody measured the thickness of their mags.
I did and one mag which is dropping freely has thickness from 0.853-0.856. The other one is 0.857-0.860 and drops only one inch or less. In my case, I need either thinner mags (less than 0.856) or sand down the bump inside magwell.
I called CZ-USA and they asked me to send the gun to them. I will, when I come back from CZ. I am sure they will take care of this.
As every year I will visit CZ-UB. This time I will meet with the P-07 creator. (Before 07 he created RAMI.) I talked to him on the phone about bulge and he sounded very nice and polite, but we will talk more in UB. (any questions?) He is busy making last changes and testing new P-07 40SW. Changes and recommendations made by Angus when he visited UB in April.