Basically it's made with a piece of 5/8" plywood and firring strips. I just built a box around the jack pedestal. Then I glued some rubber on top for a cushion.
i made one tonight--out of 3/4 plywood, but mine lets the pan sit down inside the whole deal . The trans came out super easy--i am thinking this will be the 1st time i can put it back in by myself.
