The bottle mounts are comprised of two laser cut sections of 3 mm material. This can be any rigid material, such as MDF, plywood, or acrylic. I would recommend you use MDF, as it is less prone to damage under force and can be sanded easily if the joints are too tight.
The base design has two layers, one for the section that is to be cut and a section that shows the rough placement of the bottles. This can be engraved if you would like it as part of the "note bottle" assembly; however, this is not required.
The parts required to assemble one note bottle
The servo arms that actually hit the bottles will be made using a short section of metal bar. This can really be any metal bar as long as all the servos use the same type in order to make tuning easier. To do this, perform the following steps:
The first step is to cut 15 lengths of the metal bar. To do this, use a piece of kitchen roll to tightly grip the bar at the edge of a table and cut a section around 10 cm long using...