This is a modified version of the Bay Area Rocketry 38mm kit.  I moved the motor tube 2" aft, added a third centering ring, and an Aeropack retainer.  I also used a kevlar y-bridle, 15' of 9/16" tubular nylon, and a KSR 30H chute. All connections are made with 1/4" quicklinks. I added 5 ounces of ballast to the nosecone so that I can launch on I225 motors and similar.