I have nowhere to fly indoors...
Unless you count the living room - which the missus does not
What specs is your lightweight CDR ?
It's not one of those 10g motors from Stout-Aero... or is it ?
Stout Aero 10g motors
I rewound a gobrushless CDR yesterday morning with 14T of 26awg in three colours
It goes great on 2S with a 6" x 4" prop.
I'm not sure it is suitable for anything like this biplane - even a smaller one - but I do have an idea for something...