I needed a way to hang my pliers on my Multiboard, and found el.cannibal's file - and one of the comments said to cut the base so could be printed without supports. I noticed it looked a heck of a lot like JLockrin's improved snap for Multiconnect, so I decided to mash em up.
If you're struggling, consider using mouse ears (or brim), and supports for the small bridge.
The author remixed this model.
Multiboard mounting side is from JLockrin's project, tool holder side is from el.cannibal's.