Sure sounds like you are getting it dialed in! I should also mention that with oxygenated fuels that are at most places at least in this area,I have found that just about everything likes to be a little bit richer than what you would think.
The stoich numbers are different for different fuels so you have to adjust accordingly. I know some guys are trying to lean everything down for mileage these days but fuel qualities vary and it can be frustrating when you fill up out of town and get some fuel that makes you get lean surging and pinging all the way home pulling a trailer.
I would fatten it up a tad more.

Keith