Step 5Drill and Countersink the Base and Platforms
Using a drill and a 1" drill bit, drill about halfway through the bases and platforms ON ONE SIDE. This is the countersink that will allow you nut and washer to sit flush with the underside of the boards.
You'll want to test fit your washers and nuts to make sure they sit flush with the underside of the board, if they stick out, drill the countersink a little deeper, being careful not to drill straight through the board.
After the countersink is complete, drill a 3/4" in hole right in the center of it, so that the all-thread fits through.
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