Also curious about this. I have a sport license now, but have been considering "upgrading" to a private. Operating at the 1550 instead of 1320 MTOW so I could legally run a larger engine, and still fill up on fuel etc. I live at 6700ft elevation in colorado and fly to 14,500 in the mountains quite often. I don't have a Kitfox yet either, but plan to buy one with a 912, so I'm just looking at options for down the road...