I had a hard time printing the original model because the “legs” that fit into the Multiboard tile kept breaking off.  I grabbed the STL and modified it (in Fusion) to use Big Thread Multipoints

2025-02-28 - Model Update:  Having two multipoints side by side made the holder a little wobbly when mounted to the multiboard.  To address this, I redesigned it to use four (4) multipoints and stability is a lot better.