Just starting to get into the single six .22s . This may be a dumb question , but with the price of some grips I don't want to make a costly mistake . I've looked on E-Bay & have seen a few that I like , but the Vaquero & BlackHawk are listed with some of them . Question ( 1 ) is , are they interchangeable ? and ( 2 ) are the 3 screw & the newer models the same fit ? Thanks for your time