So off to the 3D printer we go...but not without a lot of "improving" on my part. Getting the right settings for this filament took a few test prints, but in the end we got things working. I'll put my settings in a separate post.
He printed his nose cone in 3 pieces and glued them together. He created his own top, he hollowed out a cone from 123D Design, and he used a screw-on water spout that he downloaded from Thingiverse. Now he can screw the nose cone to the top of his 2 litter water rocket.
On Space Night, it will be off to the wild "dark" blue yonder.