I'm a regular contributor to the MIDIbox forum, and in the last few years have worked on a number of projects involving MIDIbox modules.

Some of them are worth documenting. You'll find them here.

I have created a 16x4 button LED matrix control surface PCB for the MB SEQv4.

Also going with the MB SEQv4 is my Track Position Display PCB. When placed alongside the 16×4 BLM the total width will be equal to that of Wilba's MB SEQv4 panel.