I have a Mood MK II on the way and already own an Onward. But I only have one power plug socket left. What’s the easiest and cheapest, yet reliable way to power both of them from one device if they’re sitting right next to each other?
Yeah, that thing was already posted above 
I find that rather bulky, it takes up way too much space for my taste. Might make sense if you can stack a few of those, but my rig does not have enough space for this,