Here's what I'm curious about, why state that the 4.5 can only be ran on 2s now? Just a couple months ago you were selling it as a 4s motor. I can understand kicking it back to 3s. But the 5.5 is still being marketed as a 4s, and it's rpm's would be around the same as the 4.5 on 3s. So it seems you are now being cautious to a fault. It also seems that it was the esc that had a much higher failure rate with the 4.5, then the motor itself. Does this play into the 2s rating?