My vision 2 did a nose dive into the pool the other day. Took it apart; dried it out; and, was able to fire it up the next day, except the camera wouldn't and rotate up and down. Two days later, it won't start at all. Question: It's my first drone, so a lot of attachment going on, but ... any idea what it might cost to replace the control board? The motors seemed to respond well, until everything quit working. I will probably get a P4 and stay clear of water, but would still like to fly "Old Paint" from time-to-time. Advice appreciated.