Just released a new, extra small carrier board for the 6mm MicroFC SiPMs. It's only 10x10mm in size with the SiPM on the front side and all the solder pads + an optional RC low-pass filter on the back. Usability-wise it's exactly the same, but it's smaller! That makes it A LOT easier to use on small scintillator crystals.

Link to the new GitHub repo:

https://github.com/OpenGammaProject/Tiny-MicroFC-Carrier-Board

Kitspace should be up soon, too!