Building a Better Ballast Box

I am in the last stages of building a ¼-scale Meister Zero. She’s a big girl, and being a short-nosed warbird, she will require some serious lead on the nose. I have owned two other giant-scale Zeros and they both needed 4 pounds of diver's weights up front, just no way around it. And, more lead will be required than usual, for the Meister, especially since I modified the incidence of the horizontal tail to...