I think Powertoys been watching me fly. I built the 1/5 Sig last winter, everything PT says is true, but because it's a Cub, not because it's a Sig. The Sig is all laser cut; The fuselage is a combination of slab side construction (lower part) and former and stick (upper part), it's all tabbed, fits perfectly, and you'd have to try to build it crooked. The scale is very nice, the right side window hinges up, the door drops down; the servos sit behind where the rear seat goes, so they're out of the way if you want to detail the cabin, but fairly accessable. It's a pull-pull rudder, everything is included for it. The wire gear is durable, but if you really want to take advantage of this Cub's nice scale lines, put a set of Robart or Wallace gear on it.

I built mine as full span, and even at 2-1/2 pounds more than what Sig suggested as the weight range, it still floats. The adverse yaw is easily overcome by programming about 40% rudder in with the ailerons and it makes a beautiful coordinated turn, but a standard bank will have the tail dropping to the low side a bit, but full-size Cubs do it,too. If you want some aerobatic ability, definitely clip the wings, and the Sig plans have all that laid out for you. The wings attach via tubes, and the struts are FUNCTIONAL, can't fly the plane without them.

A .65 Saito almost completely fits in the cowl inverted, a .72 will fit, it's a tad shorter than the >65, and would give you all the aerobatic power you need; both engines will turn a scale 14 inch prop. Mine will cruise at 1/4-1/3 throttle and take off at 1/2. I can't say enough good about Sig's Cub, I love mine. It kitbashes pretty well, too, mine is modified to a L-4 (most of the reason it's heavier). You can't go wrong with this one.