1. I usually raise my jacks with the trailer sitting an inch above level. That way I can feel when the tension starts to build. Then I retract the tongue and the bars stiffen up as the weight is transferred to the truck. Final tweeking is done as needed.
2. I have the same issue with the safety chains bending the PP3P hitch lip as my chains are 4" off ground. I will probably add an extra link for my next trip.
Bob the frog from Montreal
2009 Flagstaff 227 pup (Sold in 2014)
2015 Wildwood 261BHXL
2010 Mercedes-Benz ML350 Bluetec
ProPride 3P Hitch