I've finally figured out the formulas in a clean way (these are on the spreadsheet as well):

Hope it helps

EDIT: Here's the new and better (???) taiko pp calculator (automated 300 hit window calculation based off _Gezo_'s od table): https://www.dropbox.com/s/52mikcnntehqn ... .html?dl=0

NM OD: Initial OD

EZ OD: OD/2

HR OD: OD*1.4

DT OD: ROUND(OD/1.5+5.5) TO 2 DECIMALS

HT OD: ROUND(OD/0.75-5.5) TO 2 DECIMALS

EZ+DT OD: ROUND(EZ OD/1.5+5.5) TO 2 DECIMALS

HR+DT OD: ROUND(HR OD/1.5+5.5) TO 2 DECIMALS

EZ+HT OD: ROUND(EZ OD/0.75-5.5) TO 2 DECIMALS

HR+HT OD: ROUND(HR OD/0.75-5.5) TO 2 DECIMALS

300 Hit window: ROUND(49.5-(OD/0.5)*1.5) TO 1 DECIMAL

Hope it helps

EDIT: Here's the new and better (???) taiko pp calculator (automated 300 hit window calculation based off _Gezo_'s od table): https://www.dropbox.com/s/52mikcnntehqn ... .html?dl=0