Awesome okay I understand it more. So does a power module like the 3DR one is that considered a BEC? Also, if my 4 in 1 ESC has a 10V BEC output can I power the servo rail on the Pixhawk? I was wondering what is the max voltage input on the servo rail. So for your drone you only need this Mauch system and not a 3DR power module because it has 2 BEC’s? Also, what is a good step down module?