If you use your left hand to hold the bar in a deep dive-bombed position (like the bar almost touching the strings) you can safely adjust the posts without almost any resistance.
The knife edges sit in the post's <. By holding the bar in a deep dived position while turning the posts you are not dulling the edges, and essentially it would sharpen the knife edges, although I certainly would not do it for that purpose. Try it and you'll feel how much less "traction" there is.
The knife edges sit in the post's <. By holding the bar in a deep dived position while turning the posts you are not dulling the edges, and essentially it would sharpen the knife edges, although I certainly would not do it for that purpose. Try it and you'll feel how much less "traction" there is.