Primarily the event is a 'SANCTIONED' BRCA event where all the electrics have to be approved equipment.
The club or clubs kindly run open classes next to the official meeting for the club racer or the ones that want to practice another class but on sanctioned events everyone has to run to the rules of the day whether in an open class or not.
If you need a legal motor to run for the day let me know and I can help you with an Orion for the day
