yah, but candling means more handling,, and it doesn't hurt the clears to go full term,, once in awhile I get a stinky, but those are usually cracked eggs..Yeah no plans on doing that ! Good advice.
I know you don't candle but maybe worth looking into on customers eggs so you can pull the clears.
I wouldn't look forward to candling 100 to 1000 eggs, even a few at a time..