>>10594111>Maybe using the Saturn design as a template, and using more modern technologies to replicate it today could be doable.
This is a winner right here. Don't try and make a copy of the Saturn V, but take the best bits of it and realize them using today's technology.
Like, I want to impress upon everyone here just how much better and precise modern manufacturing is than it is in the 60s. The computerization of everything means you don't even really need to try that hard for good tolerances any more. Parts that used to be needed to be measured by hand and corrected to fit into tolerances after being manufactured can now pretty much be thrown straight onto the assembly with nothing more than a cursory check. We're REALLY good at building things precise the first time. Way better than we were in the 60s.
The F1B is interesting, because it's basically how we'd build an F1 today. You remove the exhaust being injected into the chamber and just dump it off the side to simplify the engine bell. You get rid of all the tiny parts that used to be made by hand and replace them with big assemblies manufactured in lathes, mills, and 3d printers. In the end, you get a rocket with maybe 95% percent the efficiency at 10% the complexity and amount of parts at maybe about 50% of the original price. That's a winning formula right there.