Needs C6-5 Estes's Engines. Can glue body extensions and body together but do not glue tip. To try and reuse you'll need a parachute. Print the parts the way you see them in picture two and they will not need supports. The parachute can be tied onto the tip and make sure to glue some of it to the rest of the body. If no parachute it glue everything together and it should fall down and still be in good shape to reuse if you find it. If not just reprint again its that easy. 

The print also works when shortening one of the extension body's. I usually shorten it too 3.5in but only shorten the height do not let the rest of the dimensions change. 

Make sure to launch it off a pad.  This is also the launch system.

Other than that works super cool and not much assembly. Be careful when launching. Super fun and may try to design more and make them for bigger engines. So it will go higher.