How do I identify the left (L) and right (R) arms on the Swiftlet?Updated 5 months ago

It is easy to identify the left (L) and right (R) arms on the Swiftlet as they are mirrored versions of each other.  

The Swiftlet has a "Clean side" (with no adjustment holes on the arm, and a "Hole Side" that has the holes up and down the arm to allow the "teacup" to be locked into various positions.

When looking at the Hole Side, the arm on the left is the left arm.  The arm on the right is the right arm as shown in the image below.