Glad you are all set with your .410-the Cedar or soft wood (pine) tapered wedge is a great way to pry the snap-on forearms off w/o marring the barrels. I think they make those springs to "set" with extra tension- from the possible recoil of a 12 ga. and am guessing the spings are basically the same for the snall gauges- I can't say- as I own 7 12 gauges and one 20 (older Model 12)-if you get a chance to read Phil B.'s 50 best on the F&S website- besides your nice Stevens 311- he also mentions a high-end german Merkel-forearm was fitted so tightly that the gunsmith in Germany told him to "hit it very hard" to get the forearm on the barrels! Almost sounds like the old shop mantra "Never use force-just get a bigger hammer from the tool crib"!! Welcome aboard!! RWTF