Rail Adapter Sleeve

I have a Model 60 from 1977. I'm not sure if this adapter is for the newer model 60s, but it didn't fit mine very well. The adapter was too loose, even with the screws tightened all the way. When the screws are tightened all the way, the bottom rail ends up being to skinny to fit any accessories on it, so I made this sleeve that goes inside the adapter, to make it a snugger fit, while making the rail wide enough. I do suggest using horizontal size compensation to make it fit better, since the sl