Hello, for the past year i've been designing some microspeakers on and off in the Onshape CAD software. And now I'm interested in building said design. I know it's best to use a single magnet, however getting one custom made is costly, and just one magnet would cost me around $70 so I'm going to go the cheap route (as this is mostly a personal experiment) and will be opting for 20 individual neodymium magnets with a diameter of 7mm and a thickness of 2mm. But I digress. I have been considering using aluminum foil, with a cling wrap backside as my diaphragm, but I'd like your input on the matter, what diaphragm material would be ideal for a project such as this?