Well, I'm a happy boy after today...
Still got a few things to hang on the front and carpet to put in, but it's right where we were hoping, with 53/47 distribution. With the frame we built for the nose it shouldn't add much more than 20 or 30 pounds to the front. Also made some stands for our dollies to make aligning everything easier.
Would have gotten started on hanging the nose, but we had to take off to look at an enclosed trailer. Not bad for a few hours work.