I am using the stock charger just put the new battery in a friends new CX3 and got ten minuts out of it !So we now know its not the Battery or charger. and Im not runnin a blue heat sink yet thats somthing on the list of mods. And yes the problem just kinda came up it had been runnin fine for Oh at least 60 flights with no problem thats why I thuaght it to be motor probs. I will look at the shafts agian and do what you said and check for any binding Thanks