Was reading on the GBO forum, I think, where someone took out the two hammer/trigger springs and replace them with one Grainger 31 in-lb spring. Grainger # 54MY45 Said you had to order them in a package of ten. His trigger went down to just over 3 lbs by doing that. And, it was reliable. So, I will be getting a set of those springs and see what it does now.
