One thing you may want to try is to sand your main seam edges. I use a belt sander. If you dont have a belt sander you can still do it by hand. With my belt sander, I do first pass with 80 grit, evens everything up and gets rid of excess glue. Next i wet the edge slightly, and then give it a couple of passes on belt sander with 120 grit. This adds an almost burnishing effect. Then I bevel the edge and slick it up with glycerine bar saddle soap, rubbed in with canvas or denim. Then I give the edge a pass on the burnisher which I use a wooden drawer knob on a drill press.
When i did edges before the days of the belt sander, I would keep going with the sand paper until I finished with 400 grit. (80, 150, 220, 400) Thankfully those days are gone.
Hope this helps. You sure do good work.