I put heavy duty velcro on the bottom of the cushion and the frame it sits on and it solved the problem with the seat coming up during towing. Year 6 and no problems.
2006 Maristar 200VRS MCX
KGB Ballast and all the works! (Once upon a time)
Tow Veh: 2010 Toyota Tundra
Bike: 2009 HD Street Glide
Beer:Ballast Point IPA's
Chief Petty Officer: "Results not excuses"
"You Can't Beat a Tree"