When you hear part 4 has good scans your are hearing it ironically or the retranslations. Part 4's original scans were infamously bad (or amazing if you like engrish). The retranslation is somewhat close to being done so if you read Part 3 now then you will probably get a completed retranslation of Part 4 by the time you catch up.
Yeah I did meant the retranslation. I am aware of the Duwang scans which are really hilarious.
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