Estes Great Goblin, #9724 Build, Part 11, Launch Lugs

I glued the launch lugs on before installing the engine mount and fins.

I usually fill the seams in launch lugs.

Set the lugs into two Q-tips for a holder.

Brush on a coat of CWF.

After sanding - 

Here the two 1/4" diameter are held down on masking tape (sticky side up) for a filler/primer spray.

In the second step of the instructions you are directed to "Make a line halfway between the fin slots."

To make sure that line is centered - 

Roll a strip of paper around the bottom of the tube.

Mark the fin slot locations.

Fold in half, crease the paper after matching up the pencil marks.

 

Set the marked paper back on the tube lining up the first marks with the fin slots.

Transfer the center mark at the crease onto the body tube.

Extend the line down the tube. Use light pressure when drawing the pencil line. You don't want the pencil line to scratch the tube or show through the finish paint.