II tried that one a while back and, well, I just plain under powered it.
Eventually I got in trouble and didnt have the juice to fly out of the situation and broke it.
I'd used Blue FFF and was never happy with the floppyness either.
My customer wanted this one, but around 2X ( 86" span )
You see it has a foil portion of the wing then a kind of polyhedral Tip sheet.
No word back yet, form my guy.