That is a good idea to extend the tables. In the video he said he did this to keep the board from dropping down off the support with the way it came from the factory. He could avoid that by starting with the convex side of the boards down and it will just get straighter with each cut and no drop off. We have to do that with our old Craftsman jointer and it works just fine.

Cheers, Jim ........................ Variety is the spice of life...............Learn something new every day