Estes Great Goblin, #9724 Build, Part 13, Gluing In The Engine Mount

You are directed to apply a glue ring inside the body tube 2 1/2" above the rear edge of the tube.

I marked the inside with a pencil held 2 1/2" from the lead tip.

The picture on the right shows the pencil line inside.

To give and idea of the glue placement - 

Here's a pencil line on the outside, 2 1/2" above the low end. 

Look close - you can see the centering ring through the fin slot with the engine mount slid in position. The ring will hit the glue ring and push the glue forward about 3/16".

A dowel was marked at 2 1/2" for the depth gauge. A ring of glue was applied around the top. Roll the glue inside stopping at the pencil mark.

  

BE SURE THE MIDDLE CENTERING RING NOTCHES ARE IN POSITION THROUGH THE FIN SLOTS.

I used two fins slid in place (no glue yet) to lock the engine mount in the correct position. 

A glue fillet is applied at the joint of the rear ring and body tube.

The instructions say to apply a glue fillet to the upper centering ring. This can be applied from the top using a longer dowel. It isn't easy, but can be done.