I am thinking about purchasing a .22 kimber conversion kit for my Custom II tactica .45l. Does anyone have experience using one of these units on a Kimber alloy frame. Kimber says it works fine. I do not want to damage frame. I am shooting 1911s in 9mm as well as .45 and thought adding .22 would be inexpensive practice for the larger formats. I would appreciate anyone sharing experiences on this conversion. arkieron