The new improvements of the plastic transition for the LM section makes the build easier than the previous versions of this model. However, it still involves some advanced techniques, and the instructions have not been updated in all the places they should have been. If built in the stock manner it flies well on the recommended E30-4 engine,However, I felt the need to strengthen it a bit. I ordered the Molding Oldies Fin can/Fin pieces, as well as the one piece command module. Face it, the stock pieces will break upon landing if not reinforced. I also ordered a 3d printed 3rd stage transition from Shapeways. I replaced the motor hook with the Estes screw down system, and beefed up the centering rings. I replaced the chutes with a 36 inch and a 24 inch nylon version. Flew it on a F30-4FJ went 400 feet with deployment slightly after apogee. Landed with no damage at all. Get this kit, beef it up, fly it and have a great time