Like I said in the section, you should only consider plays that had "very" low unstable values. A low unstable value means you were mostly constant in your hits and your +/- values are more definitive about you're own required offsets
On the other hand a high unstable value means you weren't constant in your hits and in turn your +/- values aren't really definitive enough to warrant an offset change. What I mean is, playing a song where you literally hit all over the place trying to find that 300g sweet-spot will in-turn give you +/- values that are "all over the place".
Your results seem pretty normal, you don't seem to need offset.
On the other hand a high unstable value means you weren't constant in your hits and in turn your +/- values aren't really definitive enough to warrant an offset change. What I mean is, playing a song where you literally hit all over the place trying to find that 300g sweet-spot will in-turn give you +/- values that are "all over the place".
Your results seem pretty normal, you don't seem to need offset.