Something which has just occurred to me about the milair machines I see on my setup. I routinely see multiple tankers from the US military (KC10 and K35R mainly, four distinct aircraft in the past two days), but much less often any acft that would make use of them. In the same time frame (two days), 3 distinct C17s (all US Mil) and one Canforce machine with no info (C2B00D). I don't even know if C17s are set up for in-air refueling (doubt it).
I should look up C2B00D and also try to find that refueling track map I've seen on the web (maybe at milaircomms, can't recall) and see if I'm (or my box's range is) at the end of a track or something.