Created a cockpit space and put a little bear in there.

Placed foam core in the wings.
Each wing set: one piece of 5 mm foam core extending from one wing, thru the body and on thru the other wing.

Placed a piece of 2 mm foam core in each propeller and in the tail wing.

Recommendation:
All the increases for the designs in this book are kfb.
One’s pieces will look a little better if one works lifted increases. Doesn’t matter if it’s a left or right lifted inc.