I remain 100% confident that rimlock occurs while the magazine is being loaded. If one is careful to apply pressure on the rounds in the magazine as far back and as uniformly as possible to keep the rims from separating, and to make sure that all cartridges are as far back as possible in the magazine at all times, then a rimlock will not occur. You can hear the cartridges shift as a rimlock occurs when you are loading a magazine.
With that said, reliability is the single non-negotiable characteristic of a defensive handgun. I completely understand being more comfortable without room in the magazine for a rimlock to occur.
On another subject, below is a photo of the tritium channel sight on my first generation P-32. The sight was installed by David Clay, a gunsmith in Texas who unfortunately no longer appears to be in business. The two tritium vials at the back of the slide and the third tritium vials behind the ejection port line up in a typical 3 dot pattern, although the limitations on the material available in a 1st gen. P-32 slide mean that the bottom edge of the center dot lines up with the midpoint of the rear dots. Although sight radius is about 1/3 of the original sight radius, the sight is overall a huge improvement over a factory P-32 sight. Holster compatibility is unaffected. Unfortunately I do not know of anyone currently offering such a sight.
David Clay also removed some material from the left side of the hole in the slide which supports the muzzle, and welded material to the right side of this hole to shift the muzzle slightly left. The result was taking a gun that originally shot several inches to the right at 20-30 feet and making it shoot properly centered horizontally. The gun was refinished with a spray and bake polymer finish over a parkerized base.