Swapped positions of remote and ammo for a token increase in realism about having space for an internal feed mechanism.

Version 1.2 reduces remote control masses from 1kg to 400g. Accordingly there have been a number of changes.
- Hull profile narrowed to new remote max diameter.
- Armour thickness reduced to minimum desired (5.5mm → 5mm); concavity introduced.
- Radiators restructured.
- Propellant mass reduced. Delta-V is now back to 200m/s.
- RTG moved to rear beside main engine.

Changes unrelated to the update:
- Gun barrel now pure carbon instead of steel reinforced with carbon. Now also larger calibre.
- Gun propellant changed (octogen → TNT).
- Gun armature changed (cobalt → selenium).
- Ammo container material changed (PTFE → PE).
- Propellant tank material changed from (A. carbon → VC steel).

Redesignated engine name to new exhaust velocity.

- Reduced armour closer to minimal amount needed to space modules (1cm → 5.5mm).
- Now uses less propellant with higher impulse (1kg hydrazine → 500g ethylene oxide).
- Lengthened engine nozzles (expansion angle 19° → 12°) and reduced gimbal angle (60° → 20°).
- Armour made technically partial in order to make engines external without >45° gimbal.

Overall mass is reduced by 2.36kg and cost by 30c. Delta-V is also reduced (206m/s → 186m/s) but is relatively unimportant to the craft's role anyway.

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