Hey guys, coming back to the forums after a hiatus that was entirety way too long. Anyhoo, picked up a couple of 0350's in the 25, 000 serial # range. The liners in these knives are completely solid except for an oval relief hole on the locking side. I have seen at least two other variations, one being a relief cutout with skeletonizing on both liners and the second is the same except the cutout isn't as wide. Is one better than the other? Does anyone know what is currently being produced and why? I'm thinkin one oval hole is easier to manufacture, therefore more cost effective. Feedback is most welcome. Thank you, gentlemen. Always stay sharp.