I purchased one of these from Amazon (Had to spend my gift card) and now I'd like to know if anybody has or intends to use one like it. I tried placing it on the axle yesterday and it has to go on the inside of the breaks. I am not a big fellow and I had difficulty getting my head and shoulders under the camper to place the jack. If the tire was flat and the trailer lower by 4 inches, I think it would be impossible. Anyone have any experience?