As I understand the 3rd generation action, none of the modifications suggested will give you a Cocked and LOCKED capability.

You can delete the decocking function, you can delete the DA engagements altogether, which will let you carry it cocked with the slide lever turned down. But if the trigger is pulled, the hammer will fall. It will land on the safety barrel and not fire the gun, but now you are in a hammer down condition with no quick way to get started shooting.

My Model 52 operates that way, it is promoted as a dry fire method. But it is not something I would want on a defensive weapon or action competition pistol.
Say, what will YOU be doing with it?