CNC cut and very accurate, made alignment for fins on a 4" two stage project easy plus the fins and the more difficult to align strakes on the AGM-78 Standard Arm. Hint, when the fins are 90 degrees to the body tube tack them in place with a couple of dots of JB SuperWeld and a 5 second zap of the UV LED curative. This will lock the fin in place until the fin root epoxy has time to harden as there is some play between the cut in the guide and the smaller width fin.