Fanbus/Accessory Power Splitter

Going from an all-in-one board (GT2560) to Mega+RAMPS left me with the problem of what to do about all my permanently-powered fans, as the GT2560 had dedicated fan sockets, and the RAMPS only gives you a 12V aux.
Additionally, I needed to power accessories, like fan controllers and so on.
And on top of that, I didn't want to have to buy anything special, so this was done on what could be printed, and salvaged from inside the house. It manages to be slick and exceedingly sketchy at the same tim