I noticed that there was a little gap between spring and tang. Also the blade was nodding downward just a bit. I deduced that there is the same kind of flaw that I had in my Case slimline trapper that managed to correct. So I went forward and started tinkering and you know what?
I ruined it. The C 75 in Otter is softer than the Case stainless. I took off too much material. I know expletives are forbidden on this forum, but try to imagine my feelings.