For another build I am starting, I ran into an issue and went to check against my 3027 version

Something seemed wrong

So did a little digging and found the instructions for the older version, 1296

For some reason, Estes changed the design.

Both have a 16.5" body tube

But the dimensions from the rear of the tube to the various wings/tails changed

The top vertical fin moved forward from 0.75" to 1"
The bottom vertical fin moved forward from 1.25" to 1.5"
The wings moved from 2.75" to 3"
The dorsal fin moved from 3.75" to 4.5"

So almost everything moved forward 0.25" except the dorsal fin moved 0.75" forward.

Anyone know why?

Moving all the fins forward will move the CP forward - typically not a good thing...