Is there a way to know (by a stamped part number or can marking) of what rotor came in a trinity motor, D3.5, D4 or Kill shot? I have several D3.5s, D4s and don't see any, except for the certified D4s that have the black sensor cover with certified stamped on it and a sticker with the power ratings.
IMO tuning rotors that came in a approved motor, if they are from the same manufacturer and same class, i.e. 17.5, 21.5, etc., should be a non issue.