Looking good. Might have a mighty tight parachute compartment.
The following idea won't change that, but might give you a better chance of a damage free recovery.
External shock cord mount.
Small loop on the ventral part of the rocket, placed at the CG of the core of the rocket POST deployment (balance point with EXPENDED engine casing and WITHOUT nose cone, chute, wadding, or shock cord.) Doesn't have to be exact, since you will likely place it before painting/finishing, might fudge a little bit tailward, since you will have more paint weight tailward than noseward.
Another option instead of a loop would be a small plastic or metal "bar" on the ventral surface, I'm sure you can actually make it look like a structural part of the fighter!
When displayed, shock cord is detached and stored in the rocket.
When prepping for flight, attach with small snap swivel, load wadding, chute, all of shock cord with a small length that runs from the attachment site to edge of body tube by nose cone (so specifically the shock cord is exposed along the ventral surface of the rocket--- still won't be seen much at launch time as it will be on the side where the launch rod is.)
On deployment, rocket dangles from the cord, cord is at CG so rocket falls roughly horizontal. Means that all the body tube and more importantly the fin surfaces will ALSO contribute to drag on descent, you'll be surprised how much that helps.
Just an idea. It's what I used on the Squirrel.
Tom