This is not a DIY module. Most of my rack is DIY, but I’m a big sucker for anything MFB. I bought this module second hand. It’s my go to bass drum. Punchy, it has a lot of CV options and just my favorite kick/bass drum. They can only be bought second hand because MFB isn’t making them anymore.
For some sound demo’s check YouTube
https://youtu.be/dlGyh8TWp2g (not my video)
Difficulty to build: No DIY.