I have 9 ESC's for sale that are extra. They work perfect with about 10 flights on them in a temp machine I was using. Leds / rotation very simple to program. Lots of positive reviews on these. I paid about 35 for each. I would use them if I could, but don't need them. Paid 315 for 9. Looking for 275 for 8 flawless near new ESC, and one brand new in bag. http://www.helipal.com/hobbywing-xrotor-pro-50a-opto-esc-dual-pack-apac-edition.html Thanks. -Cody