I got a YC interview as a single (previously) non-technical founder with this project. 12 hour flight for the 10 minute interview. Lovely to see PG, Jessica, Paul and several others I can't remember the names of (sorry!) PG was scratching his head while using it, mostly adding pictures of airplanes. Eventually I got a nice, but still, rejection email saying they loved the app but failed to see the enormous potential investors want.
It does sound like you had great time!
Your tool is really good-as I have been following and using it for a little while I can definitely vouch for its usefulness to quickly put down visual thought and present ideas.
How do you see the future without the big-return-investors kind of things?