PsiTraveller
Cosmic Mongoose
With the Cargo hauler I am not sure I would have the ship skim anything, what with the external cargo mounts making the ship rather sensitive. I think the tanks would be filled by the tender ship and hooked into position once filled, or the tank conencted and then filled from a fueling ship.
The strength of the connection and use of the external Demountable tank that is removable would have to be sorted out if the removable tank idea was to be effective. Having your tank fall off while skimming is awkward, there is all that paperwork to do, plus the whole risk of explosion.
And we really have to settle on a name for the removable fuel tank.
The strength of the connection and use of the external Demountable tank that is removable would have to be sorted out if the removable tank idea was to be effective. Having your tank fall off while skimming is awkward, there is all that paperwork to do, plus the whole risk of explosion.

And we really have to settle on a name for the removable fuel tank.