OGN Tracker

This is a superb step by step how to build your own OGN Tracker. 

I didn't make this, the name of the gentleman who I go it from is at the bottom of the document. I don't remember which gliding club he is from but Central Illinois or Chicago comes to mind but of course I could be totally off. 

I have one build and will be making another for my other airplane as they are registration coded. However, you could make it a neutral one if you often fly more then one aiplane but at this low cost I'll just have one per airplane.