Hi Bilby
I actually made that one, but I didn't really have a decent blade in the saw, and the scraps I used I wasn't happy with, so next time I would buy a new blade, very sharp and I suppose you'd want one with more teeth than less.
In the end, I fixed my router on it sides onto this jig, with the cutter sticking out basically where the saw blade is, I could only do one sheet at a time, and just ran them through like a table saw, it took 15 minutes by the time I plugged the router in, til I had the sheets on the floor to be joined, but I did get an extra pair of hands that were passing by at the time, to help me feed the sheets through.
Regards