If you are setting up cane drone reeds be careful to ensure that you seat this firmly however so firmly that the tapered reed seat of the drone is causing undue pressure on the walls of the cane. This will cause the tongue to rise during play as the reed takes on moisture and so cause unsteadiness, a very common mistake made.
Predrill and screw down to the peak of the roof, and predrill and screw down to the 2x4 roof box frame. Note: Make sure the 2x4 x 40" pieces on each end stick out 11/2" over the face of the peak, but line up with the edge of the roof box. This will ensure that each side of your roof is a perfect rectangle.