new "Ellipse" brush
system is designed to provide enough surface area to the comm to
deliver the voltage to your armature, yet fire softer to keep the
commutator from burning up. This armature and set of brushes was
ran at the
US Indoor Championships, made the A main, and made 4 runs the following
week in testing with no cuts or changes to the brushes. The commutator
shows no signs of burning nor has it changed color from over heating.