Behringer TD-3 MO (Modded Out)

Fictitious marine biology aside, I do think the TD-3-MO would be a good candidate for some circuit-bending. I would love to see what mods could be done to one of these. I’ve been searching the web, but search keywords for “modded” keep clashing with “modded out” which is in the name, so I don’t know if they simply don’t exist or if my search doesn’t work