Interesting and clever observation regarding the pre-made slides. I never liked how shallow PM appeared to mount on CZ so I’ve worked with CZC and CGW instead, and now with more manufacturers jumping into optics ready it’s still a net benefit to the majority of shooters.
You are disagreeing (initially at least?) but as you acknowledge it’s based on feelings. I’ve shot plenty using CZC adapter plates and multi-optic cuts with little issue. I believe proper install and the quality of the optic are the major factors. Walther is standing behind their PDP engineering but I don’t know how custom their plate fit is to the optic itself. And also regarding tight fits - I had to use a rubber mallet to install a CZ barrel bushing but it can still shoot loose if I don’t install the front sight pin. I imagine a 1911 plunger tube might fit snug but you’d still want to stake that as well.