New Way N-21 Sky Fighter Build, Part 4, Balsa & Lug Fill

The most difficult part of the build is sanding a 45 degree angle in the wing root edges. Use a sanding block for a consistent line.

This angled edge allows the wing root edges to fit over the top corner of the body tube.

Be sure to sand the angles in a "mirror" image. 

I sanded my angles a bit wider than needed. 

Notice the underside has a pencil line to show the gluing area against the flat sides of the body tube. 

On the left is a Q-tip holder to allow all sides of the launch lug to be painted with CWF in one pass. 

Be careful not to get CWF inside the open ends. 

TIP: Start you brushing from the middle of the lug length and work the filler out to the ends.

On the wing bottoms - 

I didn't brush any filled on the tube gluing area of the wing sides.