I saw the following on Pinterest, and I was inspired.
I tried attaching three boards to the pallet in the Music Area. I drilled holes and put in bolts and nuts, but it didn’t work well. Only one of the boards created a resonate sound, and I have some theories:
Hole Spacing. I noticed that I had drilled the holes in the same places
Spacers. I didn’t have any rubber spacers to allow the ‘key’ to vibrate. I tried finding a solution, maybe rubber washers would have worked.
In the end I ended up tossing the pallet out anyway. I had never waterproofed it and it was starting to.