After I thought the model was finished, I went back and checked the lug and rod slot. THERE WAS TOO MUCH LUG BINDING THROUGH THE FRONT SLOT!
The slot had to be extended to 3" long!
In the original kit, this is why the lug was glued to the outside of the cone body under a fin.
Too many reviews talk about the Vulcan "tail wagging" on the way up. Most assume (like I did) it was from the launch angle caused by the lug glued on at an angle.
I was trying to correct this by moving the lug to the center.
Some glue was snuck under the slot edges and a dowel rolled over to set the edges down.
Don't go too far back, you don't want to change the profile of the cone.
The tips of the fins were pointed, weak and prone to bending.
Just the tips were cut back and the underside strengthened with white glue applied with a Q-tip.
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