I have first-hand experience with the reactor bipe and I can tell you it is really a sweet flying airplane. As with anything it's better at certain maneuvers than others, but I don't think you'll hear any complaints for what it is... I think people will be very pleasantly surprised. With good servos and the right prop it is a rock-solid harrier machine.

I think your setup will work, but you can expect to add some tail weight in order to get it to balance. The recommended 35-36-1200 GP Rimfire motor weighs 3.6oz and the GP 2100mAh 3S LiPo weighs 6.2oz. These together get the plane in perfect balance, so consider that with the batts and motor you have.

For those who have reservations because of landing gear issues and stabs breaking on the monoplane EP reactor, don't fret - both the gear and the tail have been updated on this plane and it is considerably stonger than the monoplane.

As for the build, nothing really to look out for except that you should be careful to orient your interplane struts properly (TF goes to Top, Front). ESC installation takes a bit of fishing but keeps it out of the way and leaves the batt compartment clear.

Anyway, hope this helps!

Steve