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Step 3Mark & Drill
You'll need to get 1/16" holes in the top of your tube spaced 1/2" apart. I left about three inches of room between the holes and the end of the tube so that the components on either end wouldn't heat up.
Tape your tube down to a flat surface, and put a strip of masking tape across the top. Mark spots for holes along the tape 1/2" apart. Take your punch, and put a little divot in the center of each mark. Carefully drill each hole, placing the 1/16" drill bit square into the divot.
Tape your tube down to a flat surface, and put a strip of masking tape across the top. Mark spots for holes along the tape 1/2" apart. Take your punch, and put a little divot in the center of each mark. Carefully drill each hole, placing the 1/16" drill bit square into the divot.
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