TIP: Always check the guide by rotating it one quarter turn around the tube. At the second mark, the pencil mark didn't line up with the arrow on the guide!
I made up a marking guide and got the fin lines evenly spaced.
Glue fillets followed -
On the right, is the shock cord cover position not in line with the launch lug.
That raised cover might cause friction with the launch rod.
With regards to the shock cord cover -- there is indeed a note about that in the instructions (on the diagram). Easily missed if you're not being careful. If you're in a hurry while building, the tick marks on the cover (for aligning the cover) might end up making you think the cover should line up on one of the lines for the fins or launch lug.
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