I'm glad I didn't get a Kadet Kit for my P07, as I think I would have been disappointed with its performance.
I'm sure the kit for the P07 can be made to perform very well, but it would probably take a gunsmith (or home gunsmith) who understands the P07's lockup design, because...
- the barrel and slide are never locked together as can be the case with the standard Browning Locked Breech Short Recoil designs,
- and it's barrel is not fixed in it's relationship to the sights, as is common with many fixed barrel .22 handguns.
It probably would take metal being tweaked (added or removed) at the rear of the barrel assembly where it llocks up with the slide (depending on the gun it's being run in). That may be enough so that the barrel and sights consistently align. It might also need a "tuned" barrel bushing added at the front end.
With the Browning Locked Breech Short Recoil design, barrel movement upwards is very limited until after the bullet has left the barrel -- because the slide has moved a fraction of inch to the rear by the time the bullet has left the barrel, so the barrel and slide (and the sights) have a fixed relationship untll later, when the barrel starts to unlock. The Browning LBSR design lets the slide move to the rear before the barrel begins to tilt as it unlocks from the slide.
With the P07 Kadet Kit design, recoil force will push against the frame (and the shooter's hand) and that will begin to lift the barrel as soon as the bullet starts down the barrel. If the barrel is NOT tightly fit to the slide, there can be barrel movement before the bullet has left the barrel. If it's same with each shot, it won't matter. But will it be consistent? Properly fit, it might be.
I'm sure this design is much less expensive to build than the older 75B Kadet Kit design, and that may have been part of its design criteria. It is a much simpler design and theoretically more durable -- but durability hasn't seemed to be an issue with the earlier design.
If they had used this newer design with the 75B, I'd probably still be shooting my beautiful old MK II Stainless Government Model.