sk2tobin

Professorss,
it looks like he offset the dark piece of wood in the jig to about 1 or two degrees off of 90. The mdf portion of the jig rides against the regular tablesaw fence and the two by four rides against the dark wood on the jig. You move the TS Fence until you get the right clearance between the blade and the dark wood on the jig (maybe 3/16 or a 1/4 on the back side and a nice point on the front of the shim) then adjust the blade so that it cuts all the way through the two by four but not all the way through the mdf. the shim is cut off of the two by four inbetween the blade and the jig. That is how I saw it. It really was not a very well done video. I had to watch it a couple of times to figure out how he did it. It is a really neat idea though. Hope this helps