quadrotor

Step 5:

Place one end of the 8” tubes with two holes along the center line drawn on the 2x2 aluminum sheet with the motor leg hole. One of the holes on the 8” carbon tube should line up with the motor leg hole. Place the 8” carbon tube so that the longer side points the opposite direction from the other carbon tubes. Mark the remaining hole on the 8” carbon tube on the aluminum sheet with a center punch. 

Drill 7/64” holes on the 2x2 aluminum sheets where the center punch left marks.