Audio Technica Microphones are great! But..
Audio Technica lavaliere condenser microphones like the PRO 70 and AT831B are good choices for amplifying acoustic guitars and reproducing the tone of the instrument more accurately than pickups. The soundhole mount that comes with is also quite nice, but after a few months of use I lost the screw and clip attachment on a gig. This made the microphone essentially unusable. I was quite annoyed to find that a replacement mount would cost around 40 bucks! That’s nuts! I mean, sure that’s some fine machining and precision metalwork there, but c’mon… we’re starving musicians here.
I really couldn’t stomach spending that kind of dough so I decided to take the much more sensible approach of dropping $300 on a 3D printer, learning CAD off YouTube tutorials, and designing my own replacement.
But in all seriousness, I didn’t want anyone else to have to deal with this. Having someone else design the replacement and put the model up for free is something I would have greatly appreciated, so I gave it a shot.