Model Rocket tested with Type B engines (e.g.; https://amzn.to/3mc9iab) - printable in 6 parts (4 wings). The wings need to be glued in with CA. I use a streamer instead of a parachute (don't forget some protective wadding between engine and streamer). I printed is with one-layer PLA and 0.2-layer height. As start platform is used a 2 mm steel wire.

Here is a very short assembly video: https://www.youtube.com/watch?v=Y73e03wI0Qo