Not a huge thing. No, not really, you know, but it might be helpful.
Somewhere in the editor--perhaps in the init data--it would be nice to have a tab where we could rename "Custom Itemclass XX" as whatever we like.
Such would simplify two processes: setting up init. data and constructing a subscreen. The latter is the bigger issue; it's easy to forget which number you assigned to a particular custom item, and without being able to rename them it creates an ordeal of trial and error to get the correct item to display.
It's not a big deal because it's just an editor convenience. I just thought I'd mention it.