Just tried this for the first time. Worked pretty good, except for one thing. I couldn’t get the op-z to send it’s LFO to the op-1. I configured it to target p1, which was set up to send cc1 in the midi control panel of the op-z. Op-1 can receive midi ccs 1-4 on the midi LFO page, as far as I understand. Tweaking the dials on the op-z to send these midi ccs worked, as does parameter locking. But the LFO from the op-z doesn’t seem to go through. Did you get this to work?