This spreadsheet is actually 3 calculators in one:
The “Quick” tab is a conversion of a python script posted to the FM7 forums, and it pops out a base tune with just a weight and drive selection.
The “Calculator” tab is conglomeration of all the best base tune advice I could find on the FH3, FH4, FM5,6&7 tuning forums, Hoki Hoshi, Basement Garage and Guns, Cars and Digits youtube channel.
The “New” tab is the calculator that should be used. Its more complicated as it doesn’t give you a base tune, and expects you to make intelligent choices.
I have locked all the sheets, but unlocked the boxes so anyone can try the sheets out without making a private copy.