Thanks guys. The unit I bought
http://www.acessystems.com/2020.htm is very user friendly if you understand where to go in the menu. What scares me is the the polar charts and all the stuff that goes with interpreting the info after doing the data runs. The manufacturer is sending a tech guy down this week to work with me so hopefully I'll have a better handle on it.
Helieng and Bellsux, I may contact you from time to time once I get started on my first tail rotor.
barryb