Thought I would follow-up. According to Lippert, the torque for the pin box bolts for my 15k frame was 95-110#. Upon closer inspection though, the pin box cannot be adjusted further to lower the nose of the fiver. When all is said and done, I am exactly 1" nose-high when measuring frame-to-ground between the forward-most and aft-most points of the frame. I guess not anything to get excited about, and definitely not enough of a difference to consider any modifications to the springs / suspension of the trailer. Thanks to all for input!