I once used a clear novak fan. I used a stand-off that had a cross drilled and tapped hole. I attached the stand-off from in between the bulkheads in front of the motor, and attached the fan to the stand-off with one screw and a zip tie.
Then I pulled out the fan and figured out how to not over gear the car. After that I switched to an RDX.
Speed Merchant Rev7, Tekin, TQ Racing (wire), Team Tamale
RC Excitement - Buy where you race, support your local tracks.