Primary Arms

Use this piece to mark the locations on the other side. They are to be mirrored, so make sure they aren't in the same exact orientation.

• Determine which one is arm A and which is arm B by looking at the diagrams. Label them.
• On arm A, punch the following holes on the 6” side of the angle iron, measured from the left, each centered 1 3/4” from the long edge: Also, torch the hole for adjusting the rollers at 45". Its shape is shown in the diagrams.
• Five total 13/16” diameter holes at 9”, 13”, 18”, 28”, and 30" inches.
• Torch the roller adjustor hole in arm B, 45" from the right, so the holes will be at the same frame location.