Hey Peter,
Thanks for reaching out! I have tried to build the mini mustang, but wasn't too successful with getting it to fly well. I think I should have maybe been more careful with some tolerances, and the weight of my components. I plan on building a larger FT plane that will hopefully be more forgiving. I think my next build will be the FT Guinea Pig.
Unfortunately, I don't think I'll be around for indoor flying as I live in the city, and usually work Tuesday evenings.
Hopefully I'll see you sometime at the field on a Saturday or Sunday or at a MAAC event. I'd like to see your builds and how they fly
Giancarlo