RE: IMAC vs. Pattern
True enough, although I have found that it is not that big of a deal and judging them really does little except make the contest run a whole lot slower. I think that this should only be done in Sportsman and maybe Intermediate. It's silly to judge Advanced and Master's on take off and landing. FAI is not judged for landing/takeoff.
And like I said, I tried to stay away from the details of judging, etc.
For instance:
Pattern zeros a figure at 160 degrees of over rotation in rolls, snaps, or spins
IMAC does it at 90 degrees.
Pattern judges at 1 point for 15 degrees of error
IMAC judges at 0.5 points per 5 degrees of error
FAI scores in full point increments
The sound judging is different too.