Just finished removing the firing pin block system from my Series 80 Colt Gold Cup. I filled the resulting gap with a conversion shim that is available from TJ's Custom Gunworks. It dramatically improved the trigger. Only question I have is, did I make my pistol "unsafe". I can't believe that I did since the Series 70 pistols are still out there and were never recalled. If so, why the heck did they ever make this modification to the trigger system in the first place?