2017 Rulebook updated

The 2017 Metal Chassis Rulebook has been updated to clarify the situation with brushes in FK motors.

“1.5 – Brushes and Springs – Brushes & springs may be changed. The tips of the brushes may be filed flat so as to restore the “as new” face profile of the brush. Brushes cannot be timed, drilled, friction cut or fitted with shunts.”