After laying out the position of the holes to be drilled I'm cleaning up the edge with a die grinder. The plans call for a 1/4 inch hole every 45 degrees and at the bottom edge 1/8 inch holes every 3/8 of an inch for the Epoxy to grip the electrodes to the threaded end cap. The 1/4 inch holes are for water to be able to enter the electrodes. I'm skeptical that it would require this many holes, but we will do what the plans call for. The inner electrode also requires these same holes.

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