SPS - How to Build it?

Well I'm no engineer to be getting into the specifics, but is there any
reason for the Stirling engines to be on the shadow side? If some of the
collected thermal energy has to be used just to keep the equipment above
-200 Kelvin, that's a needless inefficiency, one that can be easily
corrected. Thermal energy from the sun is abundant out there, and free for
the taking if you just consider the geometry of your craft.

As for operating as you build, the only problem I can see, and it's
solveable, is that any time you do need to use the thrusters, the
center-of-balance equation changes as more pieces are added to the
satellite. As long as you don't use your thruster, it doesn't matter what
the configuration is.

dADdy ASTRA