This power distribution board makes for a really clean build with the Emaxx nighthawk 250. There are tons of 250 class racers out there, for the money this frame is a no brainer. This IS the only purpose made Pdb for the nighthawk and it works great. 5 or 9 volt filtered power for your camera and vtx ensures a clean signal. There are multiple auxiliary pads that you can tap into for anything, LEDs, Osd , etc. The documentation provided on github is well done and won't leave you scratching your head. If you do have any questions about the Pdb there is a thread on rcgroups and the designer, builder is on there all the time so there are answers.
This is a great power distribution board for a great budget frame that makes for a clean build.