First of all our Jayco sits way closer to the ground than the Heartland we had. We also have put another set of BAL in front of the wheels. I also have made cross stab and we put the BAL on some 4x4 with plywood and it is stable. Made some wood 4x4 with all thread rod between the wheels and it does not move.
2011 jayco 33rlds, 2002 Ford excursion, v-10, 3:73 gears 4x4 mine. 2008 Suzuki sx-4, hers. Retired Air Force, now Retired.