I was looking for an easier way to assemble my pendulum wave kit. I tried to hang each pendulum off of a rod, each pendulum is rigid along it's length which means no more difficult strings. One length of piano wire is run across the bridge and through each pendulum, the rod runs in a grove across the bridge.
20mm ball bearings were clamped into the pendulum as weights, the tear drop shape clips on from the bottom and holds the ball in place. The cut outs around the hole allow the ball to squeeze into the gap and be held snuggly while the pendulum swings.
As you can see the bridge still isn't strong enough for the weight of all the pendulum. The short pendulums also don't swing for long enough to complete a full cycle so it's back to the drawing board once again.