For my X-24 builds I made the nose cone and engine tube from cardstock. I attempted to make a blank artwork-free outilne template for these so you can print up this additional page and make your own if you don't have any of those handy and can't wait for mail order to arrive. If you haven't built a cardstock cone before, take a look at the nose cone templates and instructions from Eric Truax here:
https://rocketry.wordpress.com/ulti...partial-builds/
Alternately, you could cut the engine tube template a little longer, and instead of rolling it around an 18mm engine, you could first wrap a length of streamer around the engine, then make a custom sized tube of slightly wider diameter that will fit the streamer and engine, if your local field does not allow engine tubes to be ejected without a recovery device.
(updated PDF, the 1" reference square was not the right size)
after making this nose cone, I realized I measured something wrong, it just does not look right, I will update the template with a better looking nose. Here are some pictures of the build process. Don't attach the nose to the body tube until after the body tube and former has been installed in the main body shroud. My pictures got re-ordered, oh well, you get the idea.
(updated PDF with better shaped nose cone)