I agree that these type stands really help. Bought a pair of BAL X-chocks for between the wheels - that took about 75% of the wobble out. Then added a pair of these jack stands in front of the forward axle, and a pair behind the rear axle. That took another 20% wobble out, so we're really solid now.
2003 Ford F-350 V-10 Crew Cab 4WD Long Bed
2004 Jayco Designer Medallion 29 RLTS 5th wheel
Bill, Gayle, and Mindi (dachshund)
Retired at last !
Nothing is foolproof to a sufficiently talented fool.