I have them, and they work fine. I use them in classes and competition, which is harder use than 90% of the Internet commandoes have probably ever engaged in.
but it worked out way easier than I was anticipating. I couldn't use the tool for for the liner. My liner fit tighter around the tool than in the channel, so the tool would pull it out. I ended up just dropping it in and guiding it with very light pressure and a pin punch.
