I don't know how wise this is but I've made huge adjustments just to see what the result would be. I'd test the extremes, then I'd go half way, then I'd test half way of that. I found that the helicopter didn't go haywire and that it didn't become uncontrollable all of the sudden. Rather, it become a little sloppy and the tail required a little more work to keep in line...but the helicopter was still flyable. Now, I'm not advising you make huge adjustments - especially since you're still working on your hover - just something to keep in mind about the POTs.