I backed the sear screw off to where the trigger is way easy to pull. But...
From what I can figure out with the lever down, but the hammer not set, and the sear screw backed out there is no tension on the sear spring. The trigger has alot of take up.
Then with the lever up and the hammer cocked the hammer spring mashes down on the sear spring. That is what gives the sear/trigger a heavy pull. So it may be a balancing act. I will have to adjust the hammer spring and see what it does.
Learning is fun.
I edited my other above pics.