I'd like to get my old E-sky E500, same as big Lama, flight ready for my granddaughter. The 3 in 1 from Esky isn't worth a darn, already had one catch fire and the and can't adjust out spinning with the replacement. I intend to replace it with an E-Flite unit but have a question. What is the difference between "3-in-1 Control Unit, Mixer/ESCs/Gyro:BCX2" and "......:BCP, BCPP"? Basicly, what do the BCX2, BCP and, BCPP mean?