Just curious, why do people want to eliminate the lock feature? Only reason I can think of is that they might find the button rotating into the locked position unwillingly?
If yes, I can relate but I fixed that proplem without having to remove the pin as I do want the lock when needed. I have also noticed with the button cover it is easier for the button to turn into the locked position. If you have ever pushed the button too far with the delrin cover off for some reason, this will bend the firing plate (not sure what Robert calls it) out of spec. With the delrin cover off, rotate the firing plate so it is sticking straight out the bay. The plate should be straight. If you find the firing plate bending down past the point where the screw for the delrin cover holds the firing plate, that is the problem.
With the firing plate still sticking straight out of the bay, bend it up. This will put enough tension on the button to prevent it from rotating unwillingly. You can also use a thick grease in between the firing plate & button to add resistance, the grease will also act as a lube to prevent unwanted wear. I find noalax too light. I use a type of Nyogel since I have plenty from my custom flashlight building days (it's what Surefire uses). I actually prefer using a different Nyogel in place of noalax for the firing pin contact. If you bend the firing plate up too much it will add more tension to the button which you may or may not like so adjust to your preference. Bend it slightly, reinstall the delrin with the screw, check tension, & readjust as needed.
Both my Mini & Grand did not have the issue with the button rotating unwillingly when they were brand spanking new. Not sure if I caused it but overtime I found the button rotating very easily into the locked position way too often which was very annoying. After I adjusted the the firing plates, my buttons have not rotated into the locked position even once since I made the adjustments. On my Mini I don't used a button cover but on my Grand I do. I prefer slightly more tension on the Grand for the button with cover.