boys, I have big esteem for you, but if you answer therefore, I take care myself !
the file "stima Cx fabrio.zip" is a my modified version from original by Iwilltry.
Added new function for evaluating correct air density it is an improvement.
You could try sone variation in climatic condition for know itse impact.
This is, argument of my first post and you answers only after my second post when, I have exposed a new problem.
I must cry or laugh?
ah, Basjous has extimated drag coefficient of aerocivic using the original spreadsheet