I have one with a SuperTigre .61 that I fly pattern with. I don't care for 3-D so I can't comment on that
but it flies very well as an entry level sportsman pattern ship. I took extra care to make sure all the control
linkages and hinges had no slop and sealed all the hinge lines because all the control surfaces are so large.
I used carbon fiber pushrods and MK metal control horns ( no plastic or nylon ) to eliminate any flexing.
I worried a little about flutter also with the huge ailerons and elevators but so far I have had no problems
and I have flown it at some pretty fast speeds along with outside loops and some other severe maneuvers.
Sorry to hear about your problems but so far mine has been pretty solid , my only complaints are the covering
wrinkles terribly after being in the sun for a few hours and its a handful to make it track straight in a crosswind.
The widebodys are good in calm weather but not so good in a strong wind. I guess you can't have it both ways.

tommy s

PS: I forgot to mention that elevator bellcrank that comes with the airplane is a piece of crap / replaced it
with an MK unit from Central Hobbies.