do not let them give you the extender. It has been nothing but headaches for me. It is underdesigned!!! If they send you the cam without the nose and include the 'extender' package send it back!!!
It's a bs way of charging an extra $30 instead of sending the correct cam. You tell them i said so and i was not impressed with the way the nose extender was engineered. I had to redo it myslef. Lucliky i have a mechanical engineering degree.