Fictional speech disorder-- not-so-fictional help wanted

[chordatesrock]

I'm working on something-- in fact, I'm almost done with it-- that partly intersects with my own experience, and partly doesn't. The problem is that I can't just ask someone with the condition I'm writing about for help, because it's partly made up. There are case studies of people who seem to display the same symptoms (two of them), but I'm not about to ask them even if I did know how to track down anonymous people.

However, even though the disability is made up, it rings true because it's very similar to multiple real conditions. (It really seems like it should be real, too. It's so plausible.) Additionally, it's central to this fic, so I can't just gloss over it.

( Wall of Text about the fictional disability and my fic )

I would like to ask people with personal experience to give opinions about this. I do need a beta for characterization, but I'll ask for that on a fandom-specific community; what I'm asking for here, now, is just to talk it over with people. Is anyone open to that?

Thank you. :)