Whereas I was asking for a bit more detail - an unfretted note shouldn’t buzz or rattle so in theory an open string could be set much lower than a fretted note on the same string but that’s not the best guide when one starts to play!
@MirrorMan do you have experience setting up your basses or do you normally get it done by a tech? I only ask as I’ve sent an e book to a few folk with loads of info on set up and it comes with some gauges which can be printed and templates made on old cereal boxes or thin card. It’s written by luthier Jerzy Drozd - I think I’ve sent you a copy ages ago @Al Krow?
Happy to send it on @MirrorMan if you think it’ll be useful and if anyone else fancies a copy just get in touch.
*I found the link on his site
https://www.jerzydrozdbasses.com/the-ultimate-guide-to-the-perfect-bass-guitar-setup