I just got sample set of SC Precision's new 10-Series Airfoil Rail Guides for 1" rails. Thanks Scott! The larger 15-Series guides debuted at Red Glare XI and seemed to be a hit. Scott's rail guides are CNC machined from black Delrin to a true NACA airfoil shape. This shape is more aerodynamic than standard buttons and are lower profile as the mounting bolts are counter sunk. A pair of black socket head screws are included. The pointy back end is reported to make it easier to mount your rocket on the rail, a claim I will test at the next launch! I stole a photo of the loose buttons from Scott's site and added a photo of the buttons mounted on my Landshark 2.0.