Sometimes you find design inspirations when doing image searching.
When the Nike X kit was introduced in 1975, the Estes designers didn't have access to the internet. They were going off what few pictures were released at the time.
While looking up pictures of the Sprint ABM I ran across this.
You can bet the Spartan ABM was the inspiration for the Estes Nike X kit ,#1270.
You can see the instructions courtesy of JimZs; CLICK HERE
The roll pattern was copied. The nose cone fins were made smaller and set back onto the body tube. They looked more like small conduits now. Estes instructions called them a "balsa fairing detail".
The "openings" beneath the middle fins were a simple decal wrap.
A great design based on the real thing.