[GUI]

The flaw* with the kit chassis is the length of the axles between supports (the two c channels) makes it susceptible to damage from hard vertical impacts on the wheels. Two possible fixes for this are to increase the axle size to 1/2" or to move the two c channels closer together (reducing the bending moment on the axle from any given load on the wheels).

*Flaw in this case refers to a structural limitation, not a fatal mechanical design oversight.