Hap:
I wasn't at the Grand last year, so I can't say you are incorrect about the targets, and I do understand that you know what you are talking about. It's just my view, or maybe it's a hope really, that at the Grand I'd be surprised to find many fields that were consistently, illegally high. I'll admit, using the angle method of setting height with no T-Bar, who knows?
I'm not really sure about the 12 foot change, but I'd agree it was to try to make things more consistent, especially since 12 foot is crazy high in my opinion. I believe ATA really is trying to get more consistent targets thrown and that is why the rules are not as rigid as at one time. They realize some fields are not built the same and they are giving us the leeway to try to make each of our fields look as consistent as we can, even if that means one house throws a target to a differnet height at 10 yds than the other. At least that way we can keep roughly the same "face" on them if machine placement varies. The wiggle room I had in mind was the ability to measure height from the trap arm instead of the level of post 3's pad, combined with the 8 to 10 foot range, which can help with some situations. Note, I am saying we have the go-ahead to do this, although I'm sure it is rarely done.
My last post above was mainly because I, rightly or wrongly, was getting the feeling that some posters were getting the idea that high targets were illegal, which is not necessarily the case, and that if you really think about what is involved with building a field and placing a machine in a house, you have to accept that there will be variance not only from club to club, but trap to trap in some cases. There is more to presentation than most shooters realize. I know I am preaching to the choir when talking to you, but others don't think about all the factors involved and don't realize that every 9 foot target won't look the same as another 9 foot target, even when both are perfectly legal.