Haven’t really kept up with the Marlin quality issue in great detail. I know that their machinery was worn out before Remington acquired them and that Remington has made significant capital investment in their effort to revive the Marlin line. I recently acquired a 336Y “Remlin” and I’m very impressed with the quality of this rifle. I would like to acquire another in either 45-70 or perhaps 35 Remington. Like the older model 94 Winchesters, its hard to find an older Marlin lever gun that hasn’t seen plenty of hard use. I’ve also read quite a bit of discussion about the JM stamp and I’m not all that sure it means much, save the designation of an original Marlin barrel. So I have two questions: 1) What dates of manufacture are the ones to be avoided? 2) If I guess wrong and end up with a Marlin (not a Remlin) with a problem, will Remington repair the gun for me...pretty sure I know the answer to this one but thought I would ask anyway.