I have flown this several times past Mach 1 since the fins are perfectly aligned every time. All you have to do is print it (10% fill, normal speed print, with rafts) and epoxy the fin can a quarter-inch or so above the bottom (so you can use a ring of duct tape for motor retention) of a 12" (or longer) strong body tube (it is perfectly sized for Blue Tube) and tape a golf ball to the top (range balls are free nose cone + weight, which you will need). If you have extra epoxy, lather it on the fins for a smooth finish and extra strength. The launch rod lugs and fin fillets are built into the print. Ready to fly in 5 minutes with single use Aerotech motors (I use the H135 or H195 to go supersonic, but for those without Level 1 Certs, you can fly the G-motors just fine).
Launch photos: https://www.flickr.com/search/?text=3d%20print%20rocket&sort=date-posted-desc&user_id=44124348109%40N01
Here is a talk I gave on 3D-printing and rocketry at MakerFaire: https://www.youtube.com/watch?v=IBMMPBpZeHo
Blue Tube supplier: http://www.alwaysreadyrocketry.com/about-us/blue-tube-2-0/