Hi, Had to change the blades in my 8 inch Pioneer joiner. I've changed them before and did it the same way that I've always done it. I first level the tables (make them even with each other). Bring the cutter head to 90* before I start.Then I have a magnet setup to hold them in place. Set the first two then set the third one and it wouldn't clear the out feed table. The first two cleared the out feed table just fine.I ended up slipping a shim between the magnet and the blade. Had to go back and do the same thing to the rest of the blades. Seems to have fixed the problem. These were new blades not resharpened. I'm thinking that the one blade was just slightly bigger than the rest. Maybe a couple of thousandths. Jim