Happy new year to all RocketryForum members! And now.. back to Soyuz building. It is time to put together the pieces. Here the fin assembly Here the picture of fin alignment tool. I saw this tool in one of the video made by George (Air Command Water Rockets) and immediately I made a copy. It is very easy to build cheap.. and it works perfect! It is made with aluminum profiles L shape you easily find in the hardware stores. In the picture it is also well visible the central core tube. As written in previous post the space between external and internal tube is then filled with foam. Here one of the shroud. You see the centering rings and some reinforcement made with some wood sticks. The inner surface has also a layer of epoxy to give a better stiffness and avoid that foam pressure makes deformation.