David,

I was not there friday in Austin when you lost your bobcat, I showed up 2 hours later, but 2 guys I work with were there and they were watching your flight very closely. They said indeed you low pass was very fast and the pull to vertical was pretty agressive. As the plane went vertical they both said they saw something fly off the airplane. Never really looked for the piece due to the aftermath of the crash, everyone was busy.
Don't know if this info will help or add more confusion.

Regards,

Dan M.