Ive had a Mod 25 for three years without any maintenance done to it. I expect I should give the spring a spot of oil or grease, not forgetting linkages, but haven't a clue how to get at it! Anyone been inside one to give a bit of TLC. With it being semi recoilless, barrel and piston on a rail. I don't want to start unscrewing things without knowing i'm not going to have things bounce out and across the room etc. Its a good shooter by the way. Thanks in advance. ATB. Pete.