I’m currently looking for the Zu modded Denon 103 for my cartridge but Zu is sold out.
I use Zu Audio speakers and cables, but if you want to put Zu Audio Denon 103 on your technics stock tonearm it will be a mismatch. You’d better look at what Zu Audio used for their Zu DL-103 HERE It’s Audiomods tonearm from UK on ZU Technics SL1210. You need high mass tonearm for any versions of Denon 103, the effective mass of the stock Technics tonearm is too low for such a low compliance cartridge like Denon. That’s why Audiomods tonearm was chosen by Zu Audio for ZU DL-103
About tonearm/cartridge matching: https://www.ortofon.com/support/support-hifi/resonance-frequency