John, don't worry about the so called High Jack, you and anyone else please keep posting, we are here to share our models and experiances etc.
Attached, picture of the tallest signal I have made to date. I didn't record the actual height, but probably a scale 60 or 80ft. I do recall a "Standard Length" of brass bar was too short, and I resorted to riveting and Silver Soldering two lengths end on.