...Does SPHERES make use of reaction-sphere tech?http://forum.nasaspaceflight.com/index.php?topic=42842.0
My bet is that toilets and ECLSS will have the most in space repairs. That's why I favor multiple smaller ECLSS setups with aggregate capacity exceeding # of passengers. Lots of spare parts. Perhaps the au courant magic unicorn 3-D printing might facilitate replacement of some components. Probably not.As to outside pre-TMI PICA-X inspection, a small drone vs a costly to develop and certify 2001 style sci-fi pod seems more SpaceXy. Not sure what the options are should PICA-X fail inspection. At worst another ITS could unload passengers for Earth return.