As @Kadin suggested, the UBEC we purchased in bulk was, at the end of the day, a packaged product that had two things going for it. First, it had undergone some

As @Kadin suggested, the UBEC we purchased in bulk was, at the end of the day, a packaged product that had two things going for it. First, it had undergone some degree of QA and we found the results to be consistent, which was a huge deal for us. Second, it came with a 3-pin connector that could not have been more perfect for plugging directly onto the GPIO pins. For anyone attempting something similar, here's my boy scout good deed for the day: http://www.banggood.com/External-Brushless-BEC-UBEC-3A-5V2-5S-Receiver-Power-Supply-p-949258.html http://www.banggood.com/External-Brushless-BEC-UBEC-3A-5V2-5... It's entirely possible that you could get a cheaper buck converter, possibly for pennies. However, this was not where the money was being spent in our project... and if we had to do literally anything to it to prepare it for use (such as soldering on a pin socket) it would have destroyed any cost advantage.