Anyone familiar with these for the Colt Officer model? Consensus seems to indicate that they are prone to breakage so I ordered a more robust one from Clark Custom Guns. However, I'm not sure I chose the right one. The choices were: No hole. .257 hole or .333 hole. I thought it was related to a full size guide rod so I picked "no hole" as mine is a double spring with that short guide. What hole are they talking about? The inner dia of my plug is .450. So I'm not sure what they mean. Any info appreciated.