I made 3 Teles this past year. I dig them all but , I built 2 with used necks that had string Trees already installed. the one I just finished was new and I have not installed any yet. I really do not see a difference. What are the purpose of the Trees and do you use them? Are they for tuning issues? friction slippage I don't get it. yet I think they add a finished Cue to a guitar's headstock. What do you all think?