Any good plans for a box cutter jig for a router table. I built one based on a this design https://www.youtube.com/watch?v=G01hhn-kQnc from wood magazine. However when I route the cuts, I am getting a pretty bad cut due to some vibration, which is chewing up the wood making the joint useless. I am using a double flute 1/4 router bit (1/2 inch shank). The wood is 1/4 thick and 1.75 wide. Any thoughts on a better router bit and should I go with a smaller joint, maybe 1/8 or 3/16"