Hey, thanks for sharing the box you used. Would something like this also do the trick (side note - any idea what the bluetooth is for?)? https://www.amazon.com/CME-MIDI-Thru5-WC-5-out/dp/B0B9ZJG69B/

I also made another post on the QY70 as I noticed I really don't understand the step sequencer. If you can be of assistance there, I'd highly appreciate it: https://www.reddit.com/r/synthesizers/comments/12onj3n/yamaha_qy70_someone_please_help_me_understand_the/