I had looked at some toggle clamps, but the ones I found had very short throw, and were expensive. The screw clamps were made from some c-clamps from the junk tool store (china) 5$ each, cut off the part we want and welded it to a 3/4 bolt.
The table is a great tool, from festool, it has a crosscut sled and lots of uses not cheap, but worth every cent.