This morning I was called upon by someone I know to look at their scythe and see why it was hard for the guy to use. I watched him hold the scythe and use it a little. He's tallish and his scythe wouldn't mount well in his snath in any provided adjustment to be fixed at a proper angle.
You need the blade to move (in it's arc) fairly perpendicular to the grass or other plants you need to cut. The tang of the blade was clearly fashioned either for a shorter person, or for a different snath. So I removed the blade, clamped it into a bench vise, heated the proper portion of the tang, and twisted the angle of the blade somewhere in the range of 20 degrees. That worked out great & the guy was pleased.
I'm posting a link to a page about doing this sort of thing. The demo shows an electrical-induction method being used for heating the steel of the tang to the required heat range for twisting, but I used oxy-acetylene — simply what I had in my shop equipment. I hope this may be helpful to some of you who are finding your scythe uncomfortable and inefficient.
Adjust Scythe Tang