#1: I'm trying to find all of the footage I can find.
Without leaving your desk of course. Has it occurred to you that not all this information is actually available online and you might have to go and find the actual footage in an archive somewhere, then have the right access to a projector to view it?
What I'm not seeing is ANY signs of adequate flight testing, and that the LLTV they decided to use, was blatantly different from the LM in some very critical ways.
You are not qualified to judge what is adequate, and you have so far still not grasped the very specific thing the LLTV was intended for. I'll say it again, it was intended to provide the astronaut with some idea of the way a landing in 1/6th gravity would feel, because all his pilot training has so far equipped him only to handle a vehicle descending under 1G, and there are differences in timing and response that he would not be familiar with when manually controlling a vehicle landing on the Moon. It was NOT, and was NEVER intended or claimed to be, a simulator of the LM itself.
If the AGC was as magic as they claimed - they would have done this testing here on earth, as a Proof of Concept that "yes, this AGC using IMU inputs, CAN maintain balance on an LM-like craft".
And if you can't let go of the idea of rockets 'balancing' your understanding will never improve. The AGC, among other things, uses the RCS system to maintain attitude, and the LM was not the first vehicle to use such a system.
because to have this TEST FOR FIRST TIME ON THE MOON - would be idiocy.
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Once again, the LM was flight tested three times before Apollo 11, and the systems were subject to ground tests. The issue is not the testing regime, it's your layman's expectations of what that should entail. Once again I ask, what exactly are your qualifications in this area?