Lost for a while in my system. Sorry Ed!
They're superb!
Woodsy,
Here's the parts I have for my boosters' rear end (that doesn't sound right does it? LOL).
1st photo: The small cone on the left goes on first. The larger cone goes over it such that you can't see the smaller cone.
2nd photo (from Internet): Then, there is a nickel-plated exhaust pipe that gets inserted into the small cone (circled). I think that is doable using plastic tubing and a silver paint pen.
3rd & 4th photos: The cones that are shown in the link you sent could be used for other things. If you cut them in half, they would pass for a decent landing gear fairing as on the Falcon 9 spaceships. I'm a bit hung up on how to actually do landing gear without too much finnicky model work though. I'm not much of a modeler, so it would have to be something egregiously simple, along the lines of 'Spaceship Landing Gear for Dummies'!
From Vegas Base
Ed