haha, funny you bring that up, I sat up two jackstands under the trailer and andrea and i both got in the trailer and got on the left of the tent (near the back of the trailer) and we couldnt get it to roll.
I think the biggest thing is that my tent doesnt hang so far toward the back of the trailer, so there is alot smaller moment arm for flipping it backwards. Maybe try sliding your tent forward a few inches.
Also, yeah, let me know when you want to do the supports.