MIDI is pretty straightforward on the Z left to right the tracks are MIDI channels 1-16 and the encoders/pages are CC 1-16, BUT the midi implementation is still a bit spotty in my experience, I am getting stuck notes on the FH-1 while syncing through VCV Rack-> ES-8 works perfectly. Bluetooth midi currently does not send or receive a clock (but works great for everything else).
Speculations suggest the sync cartridge is going to be out NAMM 2019 which, I assume, will put an end to all syncing issues with modular or otherwise.