Sounds like you're good to go! We don't mind helping out end users who are willing to learn things for themselves and aren't afraid to RTFM. You've done a great job getting this machine going!
I'd run them until you have print quality issues. It won't really hurt anything on this B/W model. Color machine would be another story. You can run them past on color 4/4e series machines but if you go too far past, then you'll have bigger issues.
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