have a leigh jig but the newer porter cable's are very user friendly as steve ash can attest to. not sure of the thickness allowed though.. ask jason tuinstra on the leigh as he got me started on it i havent use anything thicker than 5/4 on mine upto now. but after you use alittle it gets easier but its very handy to keep track of the setup dimensions for repeative operations in the future if there is a lag between jobs..
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