Hey, Guys here is my Waco that I just got done with last week.
It has a DLE-30 with stock mufler.
I used 2 A123 battery's and a Smart Fly Supper regulator.
Also a fiber optic ignition kill switch.
When done no balancing needed.
I flew it this weekend and love it. Even my 14 year old son fly's it.
The DLE-30 is hand full on take off.
It wants to turn left real hard so we just use 1/4 throttle.

I have nothing to say but good on building (assembling) this plane.
Great Planes Models are the best.