The first stage (take up) should be almost all of th etravel and very little of the weight. Then you should encounter that hesitation, followed by the second stage (the let off). That second stage should have very little travel, but most of th eweight. We offer them in different weights (Varmint, Natch,and General/LE)...it would be a simple task to switch out the disconnector spring and test it in a lower here at the factory.
The first thing I would do, however, is take the kit out of your lower and reinstall, goign through the actual steps and the trouble shooting portion of each step on the instruction card that came with it. We're amazed by how many issues seem to clear themselves up by just reinstalling the kits...
Give tech support a call at 866-980-7625 if you need help. they can also hook you up for the return if it does need to come back to us.
Steve/RRA