Well I let you know about the CD darn-

It seems my current Flite Metaled Thunderbolt is getting an up grade a ZDZ-80 RV pictured which will swing a 24X10 . As some of you might know I settled on Spring Airs on this project ,however the "retract tail wheel" Spring Air offered as a combo for the Top Flite 2.1 Jug proved useless- so I up graded to the Robart which inded seems popular;so now all I need to do is actuate 2 retract valves as the Spring Air Mains are ->air up and spring down,thus using one line,however, the Robart 160 tail wheel uses two. I figure one servo and a sort of "Y" push rod.