A couple of years ago I wrasseled with this same dilemma. A Fox A grade c1910 choked M/F I had opened to S1/IC. I now use the gun quite frequently as oppossed to not at all prior to the modification. Although I still feel pangs of guilt about altering and original configuration. So much so that I won't do another gun. Instead I've simply adjusted my philosophy of buying shooters and only buy those with the configuration I want. They are out there. I recently picked up a nice Lefever H 2 1/2" choked IC/F for upland. Who knows, this might have been altered---but not by me. So if you can handle the guilt..................