be sure to read the thread here about this bird...................yes it is strong, but it wouldn't hurt to beef up the firewall area...........otherwise it's good right out of the box.
they shaved weight by using interlocking construction and cut lots of lightning holes.
mine is powered by an OS.91 surpassII and came out at 7.5 lbs
it needed 2 clicks of up elevator trim and nothing else.
i'm still fooling with the CG which is at this point in time, 3/8" back from suggested.
the landings are something else............this bird lands like a trainer.
takeoffs are straight as an arrow.
flying it is a whole nother program............it is a blast, and it'll doing anything you ask..........right now i've been doing the inverted snap rolls as Mike (Minnflyer) talks about.....really cool stuff.......oh yeah, i liked this plane so much i bought 3 of them, but have since gave one away to a buddy of mine.