I have a 20 ga 147e that is extremely difficult to open and close. It is a retirement gift from the last company I worked for and is LNIB. I'm wondering if a good smith could do some polishing to make it easier to open and close. As of now, I have use my knee to operate it. It's well lubricated at the appropriate points but I don't think I can shoot 10k rounds or whatever to loosen it up. Thoughts?