These conversions work great, but had one problem. After about 250 rnds the .22lr ammo leaded up my brake. I was shooting fedrel bulk pack copper plated and I run a PWS FSC556.
Started with baseball cleats but found that the hard plastic teeth on them made for ice skates when you try and hit the breaks on concrete. Ate it hard on a stage that had the shotgun staged on a concrete pad after spiniting from another bay. Now I have the salomon speed cross 3 cs and i love them.