Eurorack: Select Bus Protocol with Hapax

Hi,
it looks like the Select Bus Protocol is getting more popular in eurorack with more manufacturers jumping up the train.
Is anyone here using the Select Bus Protocol in conjunction with the Hapax?
How does it work? How do you bring the “Midi” in?
What are your experiences?

PS: or should I post this in the Hermod Forum since its more Eurorack orientated?