I bought a set of brass router guide bushings and a set of reducer kit for a 1 3/16 PC router, from what I understand they come in two widths. Nothing about thicknesses. I bought a plate and inserts for my router also. when I went to put the bushings in the inserts they fit width perfect but not depth. I had to make spacers/washer for them to fit. Did they send me the wrong bushings or did I get rejects?