Diamond Dust CW Kit Assembly Manual page 36

Section 2: Elevon Construction – Cont.
Step 5
Next, while using a sanding block or file,
taper both outside elevon ends to match the
tapered wing tips.
36
NOTE: Be sure to match the taper of the
balsa wingtips as closely as possible.
Taper the elevons only in the tapered
zone shown below.
Your tapered elevons should look like this,
when completed.