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Editing Step 3 —

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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.