BFNY, did you end up getting the 3P? Did you use the Straptek jacks? I have a similar TT, and didn't think about clearance of the jacks.
X, I assume with your TT you have the 1,400# bars? I couldn't find anything on the Lippert site that states capacity of the Straptek.
2016 Jayco Eagle 324BHTS
2005 Ford Excursion 6.8L 4.56's, V/C Springs, PP 3P, P3
Past:
2011 Keystone Bullet Premier 31BHPR
2009 Forest River Flagstaff 830RBSS