Easy Model Rocket engine insert and nose cone

Here is a design I sketched up for an Estes-style model rocket kit using a glue-in insert which acts as the engine holder and fin guide. I printed this in PAHT-CF and it's definitely strong and heat resistant. I'd recommend something slightly heat resistant (but even PLA would probably work too, just not last too long).

I used a laser cutter at my local makerspace to cut out the fins. Body tube is a BT-55 which can be bought online. You'll also want a parachute and elastic cording.
https://www.asp-rocketry.com/ecommerce/T-55-Body-Tube-30-Long-.cfm?item_id=567&parent=13&navPanel=1
https://www.asp-rocketry.com/ecommerce/12-Bulk-Sport-Chutes-Asst-Colors-12-Chutes.cfm?item_id=1078&parent=37&navPanel=1
https://www.asp-rocketry.com/ecommerce/1-8-Flat-Rubber-Elastic-5-Yards.cfm?item_id=1405&parent=146&navPanel=

Before assembly, you'll need to trim some support pieces from the engine insert. There are 3 support structures on top of the engine insert connected to the fin guides with some small tabs, carefully cut the tabs and then the support pieces can be snapped off. See the pictures

Assembly is simple, just glue in the engine insert and then the fins glue in to their slots. Glue the nose cone plug into the nose cone. Then take care of the parachute and cording.

I skipped including a slot for an engine retaining clip; instead I just wrap a little bit of blue painters tape around the engine bodies to keep them snug in the tube.

Holds C-sized engines.

Print Settings:

I printed this on a Bambu P1S, 2 wall loops 10% gyroid infill. No supports on the nose cone or nose cone plug. I used painted support masking to only have a support under the launch guide, supports elsewhere shouldn't be needed and only waste filament. See snapshot of my slicer.