I'm enjoying the Cocobolo 501 that I purchased with a Koa 110 from the National Knife Day run. I've got a question about the 501, though - mine opens smoothly until about 2/3 open, and then it gets pretty stiff. I added some lubricant to the pivot area, worked it a bit, and cleaned it out, and it still takes a significant amount of force to open that last 1/3rd. (Photo below taken where the movement gets stiff.) I'm used to how my 110s swing smoothly across the full range of movement - are the 501s different this way?
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