UDT parameterisation of tag number properties (eng limits, etc.)

I have a generic UDT for an analogue transmitter that has 6 tags that should all use the same tag ranges (eng limits, and scaling ranges if required).

I have tried to create parameters for these and assign them to the associated tag property numeric fields, but they don’t take and jump back to the default numeric value… it looks like they’re limited to accepting numbers only.

Is this something that might be fixed in later versions of Ignition? (running the latest at writing, 7.9.3, at the moment)
Is there some other way to trick this into working? I really don’t want to have to set 36 fields manually for each UDT instance…