well after a couple of days trying to set up my DX6 with my Blade Cp. I fried the 4&1 and let the li-po's go below 9v with all the testing. did not know the lipo's were that low until i tried to charge them and they would not charge on the quick charger so had to use the stock charger to bring them back up then use the quick charger. but i had to get another 4&1. i don't know if the spectrum rx is fried doe's any one know how to test it. i will just wait until i get a heli kit to use the DX6