I have a dusty old 870 Wingmaster (circa 1972) in the back of the safe that I have decided to set up for HD use. I have followed the forum enough to discount the pistol-grip setup, and believe I will stick with the familiar stock rather than go with a folder. That leaves me with a barrel mod, mag tube extension, and sights. It is currently a 28in non-vent rib model and has a 2 3/4 chamber. Any recommendations on the barrel: Is a 20" better than an 18" or vice-versa? Should I have the present barrel cut down or buy a different one? Rifled and/or with any choke? Will a new 870 barrel still fit this36yr old gun? With an 18 or 20" barrel, how much of a mag extension should be used? And finally, is a ghost ring setup the way to go for sights? Many thanks for your opinions