I'm just starting to build one. It looks like the cabane and struts are pretty much set (according to photos). Also, the stab is pretty much set also. Declage, the difference between the stab and wing incidence then would also be set. I'll know more when I get to that point (just opened the box and read the instructions). What I'm concerned about is the balance point on the top wing. I don't necessarily doubt them, but I've had problems with this on ARFs in the past including a Tiger Moth (1/5 scale) which I nearly lost on 1st flight. Instructions indicate 10-13cm (3.9" - 5.1"). If anyone has experience in flight with this setting I'd appreciate knowing.
Steve