This is so basic I think I may have known it an forgot it, but here goes. I have a Rockler table that has a solid fence with two adjustable fences. I like it fine. But I found I have to shim out the outfeed side with something-it will not adjust out. Okay. I can find some slim plastic I guess. BUT....how do I measure to take 1/16th or 1/8th off the edge of my board? I adjust the cutter out until its 1/16th proud of the infeed fence, right? What the hell do I use to measure 1/16th of an inch on the outfeed fence. I have a bad feeling this is an easy thing but my mind has slipped a cog. Thanks fellas.