Choppers - ha!! Bought a day late on the tip. Gonna do it tomorrow. I was changing out the motor on the HBKII and took the blades off to make it easier. Just like the CP Pro, I had one nut that was constantly loose and the other was tight. Well this time the tight one fell out when I wasn't looking and when I got it all back together I couldn't find it - grounded by a nut. Then I remembered the other post about forgetting all that I had ordered and I was lucky enough to find the spare hardware kit I had ordered quite a while back. Found a nut and am back in the air. I will glue that sucker in next time I strip it down. TX.