Those jigs look like they may work well. Jerry Blake was telling me about another way to build a jig. He said to put a 2x8 block in the bottom of a bucket and drive screws into the 2x8 , thru the bottom of the bucket, and into the 2x4's on the center of a pallet. This creates a cheap and sturdy jig.
One thing that he said was to make sure that the bucket on the jig is not too tall or the boo bucket will get hung. I would drill several holes in the jig bucket to help keep them from sticking.
