The hi-tech solution for spars and motorsticks
Boron is one of the stiffest materials available to strengthen model parts subject to extreme bending loads. Run some full-strength model glue along the boron between your fingers, let dry and apply to the model with acetone on a small brush. Keep it in tension with a rubber band CyA'd to one end, stretched and held down with tape to the building board. Glue the ends down well; boron ends and pieces shorter than one inch can penetrate the skin before buckling and usually break off at the surface, making removal difficult.