Ha! I guess you've never built a balsa kit.

15 light-pace hours from pkg delivery to first flight seems like nothing to me.
But now I am curious too. Anyone know how much thrust a 2208/34 puts out with the 10x3.8 prop at 11v? flyingmodels.org doesn't have the data for this motor.
For a 3d plane you'd want a T/W ratio of at least 2:1, for aerobatics 1-1.5:1 would do, for scale general aviation you could go down to 0.8:1.
Clark