That really sounds like the symptom of too much gain -- if it does it on the ground whilst dangling, I'd cut the gain in 5% decrements and find the point where the shuddering stops. It's currently pouring down in Portland! Oregonians talk about the weather as much as the Brits -- when the rainy season comes the weather is awful! Ah well, time to fly the sim and practice the figure-eights I'm going to need when the FAA gets off its derriere and announces pilot certifications (it probably won't be called a BNUC)! Andy.