The core of the build ... straight and solid
The origianl mount is desinged for FSI 27mm motors. I made a small adapter using a standard issue Estes 24mm motor mount. I lasered a couple of centreing rings and added an Aeropack retainer.
The tailcone has centring rings glued to each side, with the motor tube passing through.
I used JB Weld for all the motor mount bonding. It's a great adhesive for this kind of work.