Hi DauntonHH, the sharing of algorithms is not MIDI related at all. You just need to sync the algorithms with server. Pair your H9 Core to the H9 Control app and go to the SETTINGS tab, then click on “Sync Algorithms on the H9 with Server.” Afterwards, conduct a factory reset by turning the pedal on while simultaneously pressing the right footswitch and the Hotknob button. Now the H9 Core will be allowed to use all the algorithms. The next thing you have to do is import a preset list with more than 25 presets into your H9 Core; for example, you may want to load the same preset list from your Max into your Core. Let me know if you need further clarification.