I wasn't going to say anything in the beginning, but getting to page 6 I got really annoyed. I can't add anything new to the conv, but I am one of those people who rents every once in a while, takes friends on outings and such. We all get that acrobatics in an unrated plane are unsafe and they really shouldn't be done (though Butt insists it is safe). I did work on software meant for detection of failure in materials. Those cracks can be minute, thinner than hair, many times visible only to the electronic microscope. And they can cause complete failure. And if you missed on page 2, there is a professional stunt pilot video, breaking the wings in flight (which seems to be straight and level) somewhere in Texas, because of the previously induced airframe stress. I'm sure he knew how to do the maneuver, he preflighted the plane properly, and still he died. I don't want to be the guy whose wings fall off in straight and level.
Butt, do me a favor, after H dude rolls the plane while on crack, check the plane (through a thorough preflight), then go roll it yourself (I'm sure you know how to do it properly)

... OK, I shouldn't say that, I really don't want you or Holocene to kill yourselves. But I don't want to fly a plane after someone who thinks he's safe does stupid things in it either. And I don't want to fly in your plane when you are a pilot for some airline. No offense, but poor judgment is manifest in more ways than one.
Holocene, maybe it's just part of growing up... one day you will.