I just picked up a Remington 870 express magnum. previouse owner had glued a velcro shell holder to the side. I didnt like it very much so I took it off. Now im stuck with the sticky residue of the glue. How do I get it off? Second is, the gun came with a red dot (took that off) and adjustable stock (hard plastic?) after a my first trip out with it. I now have a brusied shoulder. Anyone know of a decent stock perhaps with a recoil pad? That wont tear up my shoulder? I like the composite look. Not a fan of the wood ones. And on a side note is there a general procedure for taking the stock off? I have stared at this thing for hours trying to figure it out.