In an earlier post I mentioned a Stevens 16 my son had purchased. In the process of burning up a lot of 16's this weekend, we noticed a crack/seperation across the rib about 2 inches from the breech. I assume this is where the rib was joined? There seems to be no loosness or anything comeing adrift. Forget it or worry about it? My Lefevers have an almost invisible line at about that point...