Only on my 100gm and 70-200gmii
To be honest, couldn't see any real difference between them quality wise, albeit quite simplistic testing, just static shots of brick walls and some basic close ups
AF felt a tiny bit worse and the 100gm did feel like it hunted a little more but not really anything deal breaking, sure you already know about the exif quirks with the viltrox
I returned the Sony and kept the Viltrox, although mainly for use on the third party lenses, if it was only for use on the 300, would have probably gone for the Sony