I had well over 1000 hours of instructing in ultralights. Over 300 was in Thrusters, Gemini, TST, T300, T500, but apparently I don't know what I am talking about. I was part of the solution in solving the Gemini nodding problem but once again I don't know what I talking about. AUF personal and the then Thruster factory at the time knew of the dangers of EFOTF with a 503 fully loaded Thruster. I think I have been reminded why it is a waste of time posting on these forums.