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You could add a photo to one of your existing Makes and then paste the link here.
Did you modify anything about the printer, like add something heavy to the print carriage? Ringing gets worse as the print head gets heavier. It could also be due to the belts becoming stretched. You could try adding one or more simple belt tensioners made from paperclips to see if it makes any difference.

Paperclip belt tensioner
by DrLex