hello all I just bought a remington 870 hd gun. 18.5" barrel with 2 shot extension. I am wanting to ad some custom things to it. I am looking for helpful suggestions that you all have done to yours. Like side saddles? are they good or cumbersome? I do like the surefire led 618lm. scope mounts with a sight? what do you all think? I am really wanting to know what butt stock you recommend.I am thinking about a knoxx model K04100-C. Please help with ideas and pics of your hd gun would be great. thank you all for the help.