Torus Space Station design spreadsheet uploaded

In my free time I've created a spreadsheet that looks at a number of
design variables in a torus station. The spreadsheet determines the
radius, volume, structural mass, atmospheric volume, specific gas
volumes and masses as functions of desired gravity and spin rates.

Further, it calculates the tankage of various liquid gases, their
pressure vessel design requirements and the mass of that tankage.

The spreadsheet is a work in progress. I posted it in the files
section and would appreciate any feedback from those who have Excel
and will give it a look.

In the future I plan to add sections to analyze the design criteria
for spherical and cylindrical stations.

Files section on the website: "TangoMan's Design Criteria for Space
Station.xls"

TangoMan