I do not agree completely Joe. I had a gun come into my shop that was originally a double trigger 16ga DHE that was converted to single trigger by a very enterprising gunsmith. I do not believe he used any extra pieces, but did need to fabricate a few new ones. The gun is owned by a board member here. I think I took pictures of it, I'll check next week. As to whether the gun the original poster asked about an be converted back, I could not say with out removing the floor plate and having a good look around.
Steve

Firearms imports, consignments


[Linked Image from i.imgur.com]