On 27Nov2019 1058, Jeff Zeitlin wrote:
> This isn't intended as a replacement for the standard module in _all_
> applications; those two (merc and lab), for example, where the
> storage/docking spaces are specifically "cut" for the cylindrical module,
> would still have their various assorted cylindersavailable. But for e.g.,
> your LASH ops idea, or perhaps the Ministry of Colonization, or perhaps
> some of the megacorporate shipping ops, might want the squared-off 40dT
> modules for more efficient space utilization or stacking/constructing.

If the 'square' module is 40DT, a 30DT module can be used in its place
for many applications by the addition of square collars at each end (and
possibly in the middle), like a fuel tank container today.

For example:
https://upload.wikimedia.org/wikipedia/commons/5/54/CIMC_LPG_tank_container.jpg

--
Rupert Boleyn <xxxxxx@gmail.com>