Heh! I was able to make a tweak and get the trigger to 3.5#. This You Tube explains it; but fast forward to about 19:25 because this guy rambles a lot.
Took the T Bolt to the range today, Wow! I love it! Except my marksmanship sucks; pulled that last shot on the bottom. That was 50 yards and with a 1/2" cluster using a 2-7X scope, shooting prone with a bipod.