[MrForbes]

That's a good suggestion. We made our arm with a piece sticking out the back, that we can attach surgical tubing to. The tubing pulls the back of the arm (past the pivot about 4 inches) downward, which lifts the other end of the arm up. With 8 strands (two loops wrapped twice around) it does the job. We made an easily adjustable lower anchor so we can change the tension quickly to balance it just right.