I tried a tandemkross part to put a spring on the slide release so I could slingshot the bolt. It required a lot of fitting, so I gave up. My VQ parts have all been great. I have the VQ bushing.Heck, I had to pull up the video online. Every. Single. Time. I finally bought that bushing from Tandemkross. It seemed like it really helped immensely the first time after installing it. Then the next time, not so much - back to the video. I have an MKIV now, so the MKIII rarely gets shot. And when I do, I usually just clean it without disassembly. The MKIV beats any other .22 pistol I own as far as ease of takedown, and there is no close second.