was out of U of V (from what I have found). It has been done many
times but I think I have some improvements that can help you build
one in about an hour.
Drawing are not to scale, for illustration only.
Step 1: Materials
4ft x 4ft Sheet of ½ inch plywood
5ft x 5ft Piece of 6 mil poly
4 ½ inch pan head screws
20 or so 1 inch pan head screws
Duct tape (about 60 yds)
1/4 inch staples, construction type
Plastic Coffee can lid (or Cool Whip)
4 Felt floor saver pads
Leaf blower (electric)