I have manual jacks under each slide arm on both sides of the trailer and it has made a big difference. I might try adding the x- chocks though and had just purchased new Marathon D range tires. They don't have E.
2008 Modified Surveyor 303
2010 Dodge Ram Laramie 4x4
2013 From FL to Pick up Surveyor Islip,LI, PA,NY,VT,NH,MA,CT,NY and Home
2014 Sebastian Charleston,SC to Finger Lakes, Lake Erie, Lake Cowanesque,PA and home
2015 Sebastian to PA,NY,WI,MN,return to NY and home
2016 GA,SC,NC,TN,KY,OH,PA,NY,to Sebastian,FL