Enerjet by Aerotech Strong Arm Build, Part 16, Setting The Lowest Centering Ring

I'm back from vacation, hoping to paint the lower body assemblies - but, it's been raining! So, onto other steps.

 

Check both sides of the centering ring, pick the smoothest side to be exposed out the bottom.

On one side, there was a chip. I marked this side with "X's". This side will be facing up, not seen. 

The low edge of the body tube is slightly "squared", out of a perfect round. The four fins are locked into the rings and pull in the body tube. 

It would be very difficult to "slide" the ring in with the tube slightly out of round. 

On the left, I sanded an angle into the edge to make the insertion easier.

Notice the laser charred edge has been sanded.

The center of the ring also got a taper to slide over the engine mount tube.

The ring is slid in and rests against the root edge tabs of the fins.

Here I've applied a wood glue fillet around the ring/tube joint.