Coming past the house at high speed I misjudged the altitude and wound up in a tree. The impact bent the shaft inside my 20g metal geared servo, causing all kinds of fuss from the servo until I could get it down. I replaced the servo with a Hextronik 9g. I quickly noticed the sweep delay mentioned earlier in the thread, well this caused low voltage cut out when the servo stuck for more than a second or two. The end result, the ESC cut out when pulling up from a dive under power as the wings were under load and stuck in the forward position...nose dart.