Why don't these guys send any instructions? Nothing? OK, I got the extension tube and a spring and an orange plastic goody. (Remington 1100 if it matters) I can't figure out where that orange plastic piece goes, or in what direction. I removed the original factory metal part from the end of the tube to release the original spring. My tube isn't dimpled - it's an older model. I just can't figure out where, or in which direction, that orange plastic part goes. I've googled and googled and can't find a thing. The gun has a 22" barrel so I ordered the 3 shot extension which should work fine if I can figure out how to install it. Thanks!!