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Step 6Dilling the center holes
Arms:
Find the center of the X created by A1 and A2 and drill through using the a 3/8" drill bit. Take your time when you drill. I find when making such a big hole, it's easier to drill with a smaller bit first. This also prevents your rather narrow wood piece from splitting. Make sure you are drilling straight, with the drill bit perpendicular to the wood, especially when doing the center holes.
Base:
Mark the center of the bottom of B2. Using a 1/2" spade bit and go through deep enough so that the head of the bolt will fit inside without and protrusion. Then, making sure your drill bit is centered, drill a 3/8" hole all the way through the center of both B1 and B2.
Note for Option 2: If you chose to notch the centers of B1 and B2, put them together in an X like the arms before you drill through the 3/8" holes.
Find the center of the X created by A1 and A2 and drill through using the a 3/8" drill bit. Take your time when you drill. I find when making such a big hole, it's easier to drill with a smaller bit first. This also prevents your rather narrow wood piece from splitting. Make sure you are drilling straight, with the drill bit perpendicular to the wood, especially when doing the center holes.
Base:
Mark the center of the bottom of B2. Using a 1/2" spade bit and go through deep enough so that the head of the bolt will fit inside without and protrusion. Then, making sure your drill bit is centered, drill a 3/8" hole all the way through the center of both B1 and B2.
Note for Option 2: If you chose to notch the centers of B1 and B2, put them together in an X like the arms before you drill through the 3/8" holes.
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