Just purchased 4 of Bullseye's plugs. These things are machined and finished beautifully, and fit perfectly. Very easy to install, too.
He also has a nifty little wire "clip" that replaces the "fork and spring" mechanism, so that the ENTIRE IL system can be removed, and replaced with a very simple 2 piece device that plugs the hole and won't lock the gun up.
I will put these in all of my IL Smiths that MAY be used for defense or hunting. Those relegated to the range, plinking, etc., I'm not so worried about. I know locking up is unlikely, but it's a risk with potentially huge implications that can be completely eliminated for $25 and a few minute's time. Sounds like a hell of a deal to me.
Thanks John, for a great product, and great service!