Originally Posted by
bergerud
The thickness matters mainly because the board (assumed to be 3/4" thick) has to stick up 1/4" above the rails. 1/2" MDF leaves the 1/4". Also, the depth of the touch holes would have to be adjusted. Or, I suppose you could just use 3/4" MDF and then rip 1/4" off of the bottom of each piece. Same result in the end. (You could keep the bottom 3/4" but you would have to rip 1/4" off the bottom of the top pieces.)
Edit: The depths of the touch holes are measured relative to the plane where the bottom of the board rests (pretending to be where the belt would be). So, the bottom could be made from 3/4" with no change. The whole thing just goes up 1/4".
Thanks for the information. I may try it with the 3/4 inch and see how it comes out.
Mike
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