Maybe, but don’t think I actually need to share the custom part type. In my case it would be better if my friend could import a copy which she could modify for her own purposes, like you can with someone else’s question.
I am hesitant to publicly share a part type, because I don’t want to pollute the list of part types with something that was written specifically for me and not necessarily a general solution. Also, it's probably not a great example of how to write one. I shared it anyway, so my immediate problem moot.
Will