Adjustable holder for laboratory microphone

Description This is a holder for laboratory equipment for measuring noise with microphones. I use it for our Bruel & Kjaer microphones (12mm in diameter). I printed everything in ABS for temperature and mechanical resistance. No Supports needed! It has a self-locking mechanism when you tighten the screw or use the knob to tighten the screw without tools. There are 3 version of holder. Version 1 has a standard tripod mount that can be rotated 360° and the head can be rotated 180° in the second axis. Version 2 has a 90° bracket that can be mounted on a 30x30 aluminium profile. (movable in 2 axes by 180°) Version 3 is a simple version that is mounted directly on a 30x30 aluminium profile. (movable in 1 axis by 180°) It needs: M3x25 (hex screw, if you want to use it with 3D printed cap) or M3x16 screw and M3 nut for the microphone holder M5x30-40 screw and M5 nut for the base lock *Optional - You can put a stronger spring under the M5 nut and tighten it but not all the way. Then you can pu