I just can't get the blade on my Wave or PSTs as sharp as I can get other knives. I can get my SAKs, my old Bucklite, and my kitchen knives shaving sharp, but I just can't seem to get a decent edge my leathermans (OK--To be honest I can sorta scrape hair off my arm with the Wave, but it's nowhere near as sharp as I can get my other knives). Is it me or is it Leatherman?