Posted in another forum that I had picked up a very nice and gently used Rem 11-87. I've wanted to make a nice HD shotgun and to shoot in a bit of IDPA/3-Gun style shotgun stuff, too. I asked for recommendations on both the extended mag tube and the sidesaddle mount and with the usual manufacturer recommendations came a warning of 11-87s and those side mounted shell holders. I don't doubt that something along the lines of failures to feed/extract could happen to any weapon but does adding that small bit of extra weight really throw off the guns function and reliability that much? I know I've seen 11-87 done up just like that and had never heard of issues like that before. Has anyone experienced any issues or seen any issues with the 11-87 and a sidesaddle shell holder?