<<Servos do make noise.>>

Indeed. But sometimes they are talking to you, and you had best listen. We use a lot of closed-loop control systems in helicopters. These are push-pull, using solid pushrods instead of cable like a pull-pull, but the end result is the same. If the arrangement is in a bind, or loading the servo assymetrically, premature failure can, and usually does, result. Timbersnake has a valid concern.

Thanks for the photo, Wayne. I was thinking about doing just that on my H9 CAP. But why so much arm moment?

I was thinking of cobbling a system together out of some bearings, pushrods, and large servo wheels/horns I've got lying around. No sense in buying something when you've got the stuff on hand to make it.

But if there is a good reason for the size of those components, I'll buy such a set-up with no grief. Where did you get it?

And how is your heli-quest coming along?

Steve