Hi guys, just learning about this little devil at the moment, settings outa the box, TX in CE mode, S1 GPS,Atti,Atti, S2 off, 1st & 2nd flights in the bush were all good, got back home, got the software up & happening, plugged her in & enabled IOC, did IMU recal & advanced cal(couldn't hurt??) re-cal the compass out side, in the air with no problems, literally ripped off the ground(no camera) got a bit full of myself & changed TX setting to FCC & set up S1 swt to GPS,Atti,Failsafe, this is where it got odd, compass re-cal at each flight(just to get it into my head for when I travel) start up same as before, perfect, this time when throttling up to full it begrudgingly got off the ground, what a slug! From ripping off the ground to slug, still flew OK, also the idle spin sounded quieter, have not had a chance to re-test or change the cal back to test, thought I'd ask here if anyone has had a similar thing happen(operator error is more than likely the cause!) Thanks.