I decided to check a few things and just transferred my hand notes to a spreadsheet
The SG variability to actual seemed to be great till I figured the gas fill was the issue. About 4 tanks ago I started pumping at med speed till auto shut off. I then count to 5 (for the gas foam to settle) than pump 1 more time on med.
I'm taking better records now so that why it was less complete before
See what you think of this