Anyone seen a spring guide insert that would eliminate the twisting of the bolt return spring? I know on my M-14 I put in a Rooster 33 NM spring guide right off to keep the Op Rod spring from twisting, but today, having shot my SKS for the first time in a while, stripped it apart to clean it and saw the crazy twisting in the spring, as well as interesting wear marks on the inside of the receiver cover. Or is this just not an issue for the SKS?