Was reading Ian's thread about cracks, so did a look over mine. P4 Had a shaky take off yesterday. Found the problem but it gets worse. A bad motor, barks like a puppy in distress. No wonder my 4Pro, in air at the same time, was so much quieter. Gets worse. Just finished Wetsuit install! Crap. Gonna puke. Gotta go buy goofoff. Hey Ian, spin your motors by hand fast. Should be very quiet. See ya.