Estes Vanguard Eagle, Kit # 2193, Part 3, Engine Mount

The holes in the centering rings were very tight against the BT-20 engine mount tube.
I had to go back and shave down the inside to enlarge the holes slightly.

Even after scraping the fit was tight.

Look right below the engine hook and you can see where the BT-20 tube bows into the engine hook recess.

The rings were glued on with Beacon Fabri-Tac glue, perfect for plastic to tube bonds.

Here's the finished mount.

Note the engine hook extends 1/2" out the back. Normally an engine hook overhangs 1/4" beyond the rear centering ring.