Good call. He's a very very knowledgeable person. Everytime I think I have him plain as day he pulls out a book or rules or regs that predate the current ones that state what he says so I'm always looking for the sucker punch. The last one he got me on was, "What is required for an aircraft to fly VFR"? I told him, he asked if it was for all aircraft and how sure I was, we bet lunch, then he pulled out some Civil regulations that showed there were many many aircraft flying around that don't meet the current FAR regs. So now I just never know lol.