Richard, you sure would laugh at some of my landings then. That would be at least an eight for me..Thanks for the tips, sounds good to me. My son and I were testing them (retracts)without the adjustable valve and they really smack on opening & closing, the quaility look good and I have an adjustable vale on order. Thanks again for the info...............I really won't start on mine as I have two projects to complete, a Hanger 9 Taylorcraft and a .40 size GP Extra 300. With a big snow storm later tonight & thru Tuesday heading our way I'll have the time to work on them.Mike J.