I usually use the 128th-note fractioning symbol after the note, dots 45, 3, since the z is representing a very fast repetition of the note. Be sure to list it on the special symbols page.
Please forgive the tardiness of this reply. There is a glitch in the system and I’m not receiving alerts that there are questions. My sincerely apologies.
Thank you for the response. One follow up question. If hand signs are also used as in the attached image, the order would then be note, hand sign, and then fractioning symbol correct?
Yes, that is the correct order. The hand signs in percussion are treated the same way as fingerings for other instruments. So they directly follow the note.