I finally flew my Centuri Groove Tube from 1970-something. What a great launch! I did a search for upscale Groove Tubes and found some high powered upscales but I didn't want something that challenging. Excelsior has decals but I wasn't sure how big the actual rocket would be.

I'd probably want to make something a bit bigger that would take a D engine but I'm not sure about the parts to get get. Any suggestions?