Estes Klingon Battle Cruiser, #1274, Step 23, Gluing On The Drive Units

With the model turned on its side,

Here's the angle I sanded the wing extension to fit into the slot on the top of the drive units.

Mentioned earlier - I'm gluing the wing tips into the slots on the drive units. The instructions have you glue them under the edge of the wing. I felt my method would give a stronger joint.

The exposed tube inside the drive unit was roughed up with some 400 grit wrapped around a Q-tip.

This will also flatten out the round tube side giving a larger glue contact area.

Here's the fit of the top of the drive unit. 

The tip edge of the tapered wing goes into the straight slot of the plastic. 

Use the side of the of the pylon template to set the angle.

Be sure to use the "double glue" technique on this joint. You'll want a good initial grab.

Some tape will help hold the angle as the glue dries.