tomjerry1- I actually stretched the trigger spring a little, not much. It didn't help measurably but I really didn't want to increase the trigger pull that way.
AHI- You are right about the hammer sear not being a matched set from the factory. These guns are not handmade by any means, but without taking the two hammers and placing them side by side and doing the same to the sears I wouldn't know if the geometry is different. I was wondering the same thing about swapping triggers. The guy I spoke to at Volquartsen said that swapping out the triggers wouldn't make a difference in the pull weight. I don't know if he was right. The geometry could be different with some triggers giving a mechanical advantage in some instances. I expect the feel of the trigger to change just as pulling or measuring the weight higher up on the trigger would increase the measured weight.