Yeah, I have a VAF data plate that has spaces for max gross and date - best to ignore those however. You really don't want things on that plate that aren't strictly required.Quoting a DAR "Only required information on data plate is Make (builder), Model (your choice), and Serial Number (again your choice). ALL data must be exactly as shown on the aircraft registration."
Here's the thread: https://vansairforce.net/community/showthread.php?t=146606&highlight=data+plate+required