Quick question. I have a P3P and just installed the latest firmware, etc. When it is in the house or within 50' of my steel clad pole barn, I get the compass warning. I have to take it out in the field and then get away from my Polaris Ranger by about 50' in order to do a compass calibration. That's fine, the P3 seems to be MUCH more sensitive than my P2. I always used to calibrate my P2 right next door to the pole barn. Never have had a problem, though. My question is this. I am going over to my sister in law's home this afternoon for some Independence Day fun. Their house is exactly 12 miles WSW of my house. Will I have to re-calibrate the P3's compass when I get over there? If I don't get the calibrate warning, will I be OK? Or should I just calibrate anyway?