Currently, one would expect to filament wind all the tanks, intertank and nose out of carbon fiber. You can buy off the shelf machines for that. It's used wid

Currently, one would expect to filament wind all the tanks, intertank and nose out of carbon fiber. You can buy off the shelf machines for that. It's used widely for solid rockets, where the internal pressure is very high. I don't know why not for pump fed liquid rockets, maybe the design being buckling limited makes the approach worse.