This may not actually be an OS, I'm a bit foggy on the vocabulary so forgive me lol.
Either way, you can throw out a Sektor missile during f4121 and make it either 43.7% on hit or about +0 on block.
Also, on hit, Sektor recharges about two thirds of the missile by the end of the combo, and on block, you get 7.7% chip and some pushback.
I put a super detailed explanation in the description of the attached video.