Hey, I have a G20 right now and would like to get a G21 slide for it. Does anybody know what the best way to do this would be? Going the Lone Wolf route it'd cost about $520 for just the slide, I could buy a whole G21 for that and I would prefer a standard Glock slide. I'm also thinking about buying a G21SF, keeping my G20 slide and selling the G20 frame. Is that possible? Would anybody buy it? Any tips for me? Thanks!