This started out as a joke, but as I worked thru the numbers on Openrocket, the less of a joke it became and it became reality.
The nose-cone-lid-bodytube-transition is a handle from a cheap camera tripod (y'know, the really bad ones that do everything EXCEPT keep a camera steady). It's hollow, about 1mm thick, the cap is rounded, and the piece that slips (glued actually) into the shiny bodytube has a 9mm hole thru it's axis. The nose assembly will house the 10cm (4") 4 string parachute and the wadding.
The shiny bodytube is home-made from office paper rolled on a chunk of 1/2" threaded rod from work, then wrapped with 4 feet of 1" wide Mylar tape (about 0.0005" thick).
The fins are 1.5mm 3 ply birch cut with a hobby knife, and knifed edged on the flight surfaces. They are mounted on a cardboard tube "fincan".
Without the stand, it stands at approximately 235mm or 9.25" long.
It runs on a Estes A3-4 engine (13mm size).
The scary thing is that OpenRocket simulates this rocket at just over 550 feet apogee. Even if it gets under that, it's a success!