Just an annoying problem with the motors pulsing in Altitude Hold.I don't seem to be able to tune it out entirely. I've disabled the Sonar. The Quad holds altitude quite well but the pulsing upsets the stability a little.Also I'm using 12x8" APC props. Could these be to 'aggressive'? I will be trying 13x5.5" later this week hoping to get smoother thrust.