Hi, all. I was wondering what 1911 .22 conversions didn't require fitting on a Springfield 1911 frame. I've heard that a Ciener frame may probably require fitting, but there was no problem with a Marvel kit. Once you factor in the $100 to fit the slide, may as well get the better conversion. Any thoughts on this? And what about the Advantage Arms kits, do they require fitting? Thanks for replies!