Retrievable Model Rocket for 18mm engines

UPDATE: I added extra optional designs to fit some tastes and just because the other design was very basic.Added the design "Hard to print" main body with Aerodynamic FinsAdded a steeper Nosecone (comes down to preference)Added an additional middle extension piece to just glue inSo I built a little model rocket myself out of a PVC tube and was wondering if It would be able to print and fly well too. I have yet to start it since the engines I ordered haven't arrived. I will update this after I tried it.EDIT: I tried it, it flew flawlessly, way higher than my main rocket (still not a professional cardboard tube one) just because its lighter, the only problem is its stuck in a very high tree and I haven't gotten it out yet to look at possible warping or internal damage2nd EDIT: I got it back, no damage whatsoever!Feel free to leave some comments.Thanks in advance for trying my model!DISCLAIMER: If you print this rocket with the extension, its weight is gonna come close to