So, flush and go back with only 8oz of PAG 150.
No, you want 11oz of oil or thereabouts in your system. @PlayingWithTBI mentioned 8oz of oil for a single (not dual) evaporator system.
IIRC @L31MaxExpress is using 11oz (or nearly 11oz) in his dual-AC system.
You need not (re)flush your (recently flushed) system to swap to R152a. The PAG oil you recently installed will suffice.
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