I actually tooted a little too quickly on the last tank, Margaret. Last tank measurement and this one are in error, since the last fillup was not complete even though I topped up and the pump stopped twice. So this tank was under the correct mileage, last one over. Combined is 42.35mpg though, so that should be accurate. Similar to the first (correct) tank in the thread title.
I'm going to officially claim 43mpg as my new standard mpg and watch the fuel savings roll in!
These mods, perhaps combined with a few extra tricks (although I was using most of them before) are getting me 14mpg over EPA!