Purchased the FLHTCUSE7 the problem is the seat. I enjoy taking long rides with my wife. The problem is we can only ride for a few hours and then we have to stop often. I had the same problem with my Heritage ST. Fixed the problem by changing out the seat to Mustang and added Transformer foot pegs for her. Our normal rides are at least 300 to 400 miles on a good day.
I'm with you on the seat. I've read good things about the Mustang seats also -good to know it worked for you I'll look up those foot-pegs too - my wife is a bit uncomfortable with the stock foot pegs as well.