One piece maple neck with a relatively non-stiff fretboard? I'd put in stiffening rods. But if you don't want to spend the change on CF rod, you can use aluminum rods too. I often use 1/2 x 1/8" x 24" rods from the hardware store and then place them in a slot that is 1/8" wide, 1/2" deep at the heel and 3/8" deep at the nut. The rod sticks out after it's glued in and I either file it back into place, or put it in a router jig and rout it flush with the top of the neck. Regular aluminum rods like that can be worked with woodworking tools no problem. This process gives me a rod that tapers along with the front-to-back thickness of the neck - thinner rod at the nut, thicker rod at the heel. And it costs about 6 bucks for both rods compared to spendy CF. Just a little insurance to help keep things stiff. 
