I'm thinking of buying a barely used International 420 main (P:16.55 and E:6.3 to 7.0) for my M-15 (P:16.83 & E:7.83). Has anyone tried this, and is it a bad idea? If its not a bad idea, does anyone have any ideas about getting the "420" off? -William "Karen Michelle" M-15 Peoria, AZ