Well, the Gnat is now up from 2nd to 6th from last place in the "Percentage over EPA" list.
Filled up today, first time since all the engine work/replacement and had 33.378 MPG on the tank. Of course, this includes the thing running terrible driving to the mechanic and all the testing he did on it while in the shop. Lots of cold starts & stuff too - - and no "mods" on it yet. So I hope mileage rises on the next tank.
Oh, there was a big "adjustment" needed on the ScanGauge, too. It took a full gallon more than the ScanGuage estimate. So my 62 MPG I thought I got the other day was probably not accurate.