I have posted three pictures at
https://www.ahpra.org/wac1.jpg
https://www.ahpra.org/wac2.jpg
https://www.ahpra.org/wac3.jpg
First is an overall pic. The rods connecting parts are 1/2" dowel. The bulkeads and rings are 1/8" ply.
Second is the top which is the stage coupler.
Third is the botton of the lower cone.
There are three rings in the stage coupler part, two rings glued together at the bottom to center and to transfer thrust, see pic2. The upper stage had the bottom centering ring recessed, the motor mount tube went down to the solid plate, the MM tube is tight in the upper most ring.
There is a 54mm tube running through the nose cone up to where it intersects the cone that is an artifact of the jigs. On this tube at the largest diameter of the cone is a centering ring with holes for the 1/2 dowels. The bottom most ring is to give the cone a longer length.
I started by making a jig that could hold the whole mess straight.
I had a ring that fit over the outside of the cone to use as a drill guide. All the rings were clamped together drilled for the dowels all at once so they would match.
The cone was foam filled outside the 54 tube.
The key to making it work is the jig. I do not have it anymore as it was reconfigured to make something else.
Mark
In reading over the above it will be as clear as mud how I did it.
Will have pics later.
