These models are part of the "KontinuumLAB Instrument Kit" project. I use these models to make "membrane" instruments, using the CNY70 sensor modules from the K.L.I.K., and balloons for membranes. Each unit contains 3 printed pieces, one "drum" external structure, one sensor holder and one membrane holder. The height of the sensor can be adjusted. For full description / explanation, go to the KontinuumLAB YouTube channel: https://www.youtube.com/channel/UCSvGhrAVvAKpWMsooCTBWZQ. This is the video about the membrane instrument specifically: https://youtu.be/d3QUDl9lDZo All of the KLIK instruments are meant to be built using the KontinuumLAB Instrument Kit electronics. The use of 3d printed parts is optional, all instruments can be hand-made as well. I will be selling the "K.L.I.K." kit, as well as instruments based on it, in the webshop at: www.kontinuumlab.com The 3d-printable parts include: mouth pieces, breath sensors, self-flexing melodica keys, wind instrument keys, structural pieces, end pieces for making boxes, membrane instrument "drums", string instrument fret-board sensor bases and even a fully 3d-printed MIDI ocarina. The KontinuumLAB Instrument Kit is still under development, more detailed descriptions, as well as updates and more designs will be published right here.