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 time, somehow... :D

This can be used with normal PC fans, Dupont connectors, and with a small amount of persuasion, XH2.54, and the spacing is such that you can normally get away with combinations of the above.

In addition to the printed parts, you will need:
Soldering iron+solder.
Standard 2.54mm PCB pin headers - 10, split into 5 sets of two. It's easier if you keep the twos linked.
A paperclip or two.
Wiring to take power from your 12V-aux to the splitter. This can be twincore, individual stranded wires soldered direct, bought components, or do what I did and salvage a power lead from a two-pin fan.

Please note that I am not responsible for you blowing up your printers, setting your house on fire, or similar things. You're putting a positive and a ground fairly close together in the same box, and although I've tried to make the it solid and safe-ish (because I don't want to blow up -my- printer either), take care.