How is the spring adjusted to lighten the trigger? Also are you offering to mod the trigger w/ sear adjustment screw? cost?
The spring used looks to be the same shape as the accutrigger spring. Likely it IS the same spring.
The spring has a smaller 'threaded' coil that winds into the trigger body - why there is a dab of paint/glue as mentioned in the OP.
You can thread that in and out to adjust the pull weight.
If the geometry is similar to the accutrigger, you can get them under 2lbs BUT slam that bolt and the sear will skip. Here that accutrigger tab will save your A$$.
No safety tab - big risk on slam fires.
If the geometry is the same as the orig non accutrigger, not much is going to get you under 2lbs without serious safety issues. On a non accutrigger, you can remove the trigger spring, hold the trigger and #### the rifle. The pull is still heavy.
The geometry doesn't allow for any spring benefits.
Timney and RB would be a whole lot safer and likely lighter in the long run.
Liability on accidental discharge - not my idea of fun....
Jerry