Just purchased my P2V and have only flown it a couple of times. Reading about flyaways even with the vision has me more than worried. One can't afford a spectrum analyzer to verify the RF is clear. So I'm wondering if something like this would be a worthwhile add on? www.amazon.com/Mini-GPS-Personal-Positi ... uctDetails I do not know how these work, IE: what type of sim card/plan is required but it might be worth it if you value the P2V What do others out here use to track their multi-rotors with?