Yeah, pliers don't really work well because they can't grip very well. I've learned that you need to use something like small vise grips, so that it locks down on the part you are trying to unscrew. The firing pin has threading on the end inside the switch, but the top button spins it when you try to unscrew the top part. That's why you have to hold one end tight while you unscrew the other end. I've never owned a KTS, but I've heard that these Sigelei's like you said are much more solid. It would be nice if Sigelei didn't make these buttons so hard to take apart. Are there advantages to using reverse threading?