[AnimalMuppet]

I don't think that's it. 0x001_f05 starts with 0, which is still not something an identifier can do.

[plorkyeran]

0x001_f05 could be a UDL named f05 which should be passed 0x001.

[AnimalMuppet]

Oh. UDLs are a new one to me. I didn't know that was in the language.

I stand corrected.