Place back stop along far side of table to bump the 3/4 MDF into. Place strapped skin with closed edge away from me. Set MDF on angle against bump stop. Clamp entire lown edge of MDF lightly against stops. Place 2"x2" tubes across top of MDF, push down high side by hand and clamp in place.
I should have got a picture of me hiking the 4' x 8' x 3/4" MDF on my back between the two tables.