Morning and thanks for Excel..
Started to play thinking on lines of 2ndary paths and dP*Q - ala
Tecumseh.
Dunno but initially trying 1/dTwb v Q plot

Unfortunately my Excel97 seems to play weird games with "DTek and Maze4" data in your Excel(2000?) - copy and Paste Special. Will take a little time to sort.
My first impressions of results "Oh God. Why did I ask".Think "Confusing data" may be an understatement.