So I picked up a Krag on a trade, my first and only one. From researching, I believe it has a 1901 rifle sight. There is a lever on the front of the sight for wind age that is frozen in place. I soaked this sight in mineral spirit for a couple weeks but it didn?t free up. I don?t want to damage it. Should I leave well enough alone and shoot it as is or is there a way to free it up. Also, looks like to me that every sight takes a different set of screws. Anyone have some experience with these sights?