This is how I made a single stage trigger out of a 98 military two stage trigger.I used liquid steel and set it so the trigger was lifted past the first stage. Polished the interfacing surfaces and by shortening the spring a 1/4 coil at a time made a trigger fully equal to Timneys I have. Did this thirty years ago and the trigger is as good today as it was then. Have also seen it done with soldered brass lifter. I used the liquid steel just to see if it worked with the intention of changing it for brass but it was so good I have never altered it.It noe resides on my custom 7x57 albeit with a finger piece that has been shifted rearward.

Von Gruff.