Hi Steve, I have recently acquired a 500 PF. I’ve read about the experiences of yourself and others with the OEM foot and the various solutions. The Wimberley and Hejnar feet address the main issue but I still prefer the option to remove the foot.
I started by trying to understand what is fundamentally wrong with the Nikon foot. I discovered that the spring for the push button release is particularly weak and that it only needs to be depressed a very small amount to release. The button is just slightly proud of the mount and isn’t really obvious you gave your finger against it. There would be no hope with gloves.
Despite both the Kirk and the RRS feet having a similar operating method to the Nikon I figured that they must have done something a little different. I finally settled for the Kirk. The difference between it and the OEM is night and day.
It’s lighter than the original, the foot is longer and Arca to boot. The knob seems to tighten more firmly, The spring in the release lever us significantly stronger and the lever needs to be depressed much further before it releases, right into the cavity in the foot itself actually.
When holding it, it’s much more obvious where the release is but, as the lever needs to be pushed so far, it’s impossible to release by simply carrying it. In fact, if you had heavy gloves on, you might need to take them off to release.
The final benefit, if you’re one who likes straps, is the QD socket, a simple solution to many of the other contrivances. A $12 Magpul QD fitted with whatever you choose to adapt to your strap (Peak Design anchors etc) and you’re set.