Estes Lynx, Kit #7233, Build Part 4, Engine Mount

Here's how the vanes will fit with the centering ring dry fitted 7/16" from the rear.






The rear ring is notched for the engine hook.







I wouldn't cut them the way the instructions show.

Cut through the ring with it standing up.
With the ring laying flat, you have a bigger chance of cutting an angle, not straight down.

Here's how it looks with the 1/16" adjustment to the rear.
The forward centering ring is even with the end of the tube.
An engine block is glued in right above the upper bend of the engine hook.