[TML] Low tech ship design

[Thad Coons]

I'm using Andy Akins'  FF&S2 spreadsheet for my designs, but I could
use some hints from more experienced ship designers.

I have two craft in mind. First is a TL 8  Earth-to-Orbit combination,
probably
a two-stage to orbit (1st stage atmospheric, 2nd stage rocket), with both
components fully reusable. Has anyone tried designing such a thing?

The other is a jump drive test vehicle, which would start out at
effectively Jump-0. set (obviously) at a later time than the early craft.
Any suggestions on how to handle this?