Ok, I have to question something here.
About 1.5 to 2 years ago - (pre Dennis), it seemed to be standard practice on this forum that a 1" height difference on a 24 foot round or larger AG pool is acceptable, and that seemed relatively sensible to me. We had many members who were very knowledgeable when it came to building an above ground pool, that number seems to have dropped off a bit, but we have also gained a few very knowlegeable people such as Dennis.
A year later, this number seems to have risen by 100% (over way less of a distance - 16 feet), which works out to 2.66" over 24 feet, and 4" over 32 feet - now this number is HUGE, now I'm not here to argue this number, I'm only questioning it. I'd like to see some continuity here, and sure hope that the acceptable difference does not jump to 6 or 8 inches in a few more years, before we know it people are just going to throw an AG pool up on a hillside , I know Dennis builds a LOT of AG pools and likely knows what is and isn't acceptable/safe, however, if a professional built my pool with that much difference, I'd have to really question it and likely make them fix it.
When I started asking these questions before building my pool, I was told to try and keep it within 1/2" (over 30 feet), now that's relatively hard to achieve on clay soil, however, I used screenings (crusher run) as my wall base and when it was all said and done, 1/2" was all that my pool was out. First winter's frost however, changed that number to about 1", where it seems to have held steady for the past 2.5 years. I sure would not want ot see my pool on a 4" slope over 30 feet - the darn thing would look like the Titanic moments before the big whoosh!