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Step 7Construction 1 - marking and drilling
First - determine what will be the top side of the tube. If you're using ducting like I did, there's a seam on where the ends of the tube connect, this will be the bottom.
Second - Run a piece of masking tap along the top of the ducting. Using a tape measure mark off every half inch running down the center of the tape. I came 14 inches out from the center in both directions - this left 4 inches on each end of the tube without markings.
Third - Using a nail, or other object carefully tap a point in each marking with a hammer. The goal is to create a small depression at each location to facilitate drilling.
Fourth - Remove the tape and carefully drill through the ducting at each depression.
Second - Run a piece of masking tap along the top of the ducting. Using a tape measure mark off every half inch running down the center of the tape. I came 14 inches out from the center in both directions - this left 4 inches on each end of the tube without markings.
Third - Using a nail, or other object carefully tap a point in each marking with a hammer. The goal is to create a small depression at each location to facilitate drilling.
Fourth - Remove the tape and carefully drill through the ducting at each depression.
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Aug 9, 2009. 7:35 PMpatricksalter
says:
Any recommendation to the diameter of the holes here? I am thinking 1/32 but any advice from experience would be appreciated.
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