http://www.ApogeeRockets.com - In this step in the assembly sequence of the Apogee Components 1/70th scale model of the Saturn 1B rocket, you'll mate the SIV-B stage to the fuel tanks of the S1 stage. You’ll need wood glue, a ruler, pencil, a woood dowel to spread the glue in the tube, and a launch rod to align the launch lugs. Basically, this is a two step process. First you’ll glue the aft ring onto the engine mount tube and wait for the glue to dry. Then, you’ll glue in the forward centering ring. Take your time to make sure you get the tubes aligned properly. NOTE: Tim says measure 10-15/16" in the video, but the correct length is 10-15/32" (which is why he then says it is just under 10-1/2").