KCr1/Td works for J1 merchants with about 30% profit margin.
Vaguely compatible with MT designs.
Non-goal decisions:
Separate LS from Staterooms. So I can knock them out separately.
Separate sensors from computers. So I can build scouts with small computers but big sensors.
Armor must take volume.
The reduction of the computer multiples is to limit ship sizes. The requirement of a single core being able to operate a ship restricts the sizes. The particular numbers are fractional exponents of 10 rounded off...
The simplification to bridge stations is a TNEism, but worked into MT terms. It's 3m3 of panels, a roomy seat, and 7m3 of empty space. The empty space is for forming a bridge, and the needed workspace to swap seats, etc. Engineering workstations presume that drive tonnage is only 75% drives, anyway.
Minimum tonnages for fusion have gone away, to be replaced by a simple "minimum tonnage 1"... which also happens to be jug size. Little need to dial them back anyway, as fuel's been reduced to TNE rates.
Jump fuel is at MT base rates. Which makes for some more interesting uses for volume.
The use of CP for hull and armor is also used to calculate crewing.