Salty;
I've now built two Speedy Bees and I'm here to tell you that you are in for a lot of fun with this little plane.

As to your concerns;
The first thing that you have to do is THINK LIGHT!!

The Maximum weight of this plane with a gas engine should be about 3.5 lbs, try to keep it to a more reasonable 3 lbs and Andy Clancy likes to see about 2.5 lbs... but the point here is to shave as much weight off of during your building process as possible. Trust me, the less weight the better it will fly!!

One of the key methods is to use very light covering material (no cloth types), don't try to second guess the design and "BEEF IT UP!!" It will work just fine with the material provided (think light). Use enough glue to make it solid but don't pour it on by the gallon.

The engine that you plan to use is a bit on the large side, if you check the instructions they comment that a 25 in a dive can rip the wings off... only use full power on take off. I use a .20 and have lots of power, many are happy with a 15 and there are lots of electric bees out there. Suit yourself but watch your final weight (a recuring theme)

The aileron servos work very well and are much simpler than the bell cranks BUT be sure to use micro servos (think light). All you need to make this work is a 12" "Y" cord.

Balancing of this AC should be done fully covered as the covering represents a significant percentage of the planes's weight. The rudder and elevator servos are one of the key agents in the final balancing, you position them in the Fuse and then check, reposition and recheck. . . until happy.

If you take the time to build this little plane properly it will give you years of fun and excitment.

Happy Landings

Bruce