Hi Stefan,
I haven't heard of anyone flying this indoors. It is fast if you build it in it's original design (without the "calming" mods included in the flyer). You're in unchartered "indoor" territory

. I was going to be working on some FFF and Depron versions of Mini- and Micro- Mud Ducks and Agri-Ducks, this season myself. I will be posting the progress somewhere on these forums (might have to make an new subject board).
Greg