I don't have a sewing machine so I'm throwing this idea out there for anybody who wants to take it on.....what if you sew a very heavy duty fabric into the shape of a platform that would be a big wedge shape. Image a doorstop wedge with the point facing up the tree and the flat part against the tree and the fat wedge would be your foot spot. Like a 3d outer cloth shape you would stuff a trashbag into then fill with expanding foam. The foam would expand to fill the negative space inside the heavy duty cloth encasing it. Have strap sewn on like molle loops for the ocb or ratchet straps to attach the wedge ridged sack to the tree. What do you guys think....