Mike (Countercheck) and I are confuddled by these two passages:
Page 384, under “Vehicle”:
Vehicular Speed may be increased or decreased; there are three grades: Ground Speed, Atmospheric Speed and Space Speed. Increasing Speed one category step costs +3 pts. Decreasing Speed one category step costs -2 pts.
Page 388, under “Device: Technological Stat”:
Human Speed costs 4 pts for 1D, +2 pts per additional die. …
Surface Speed costs 5 pts for 1D, +2 pts per additional die…
Atmospheric Speed costs 6 pts for 1D, +2 pts per additional die…
Space Speed costs 10 pts for 1D, +2 pts per additional die…
I can see two ways of interpreting this pair of passages:
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Increasing a vehicle’s speed from (say) Atmospheric 7 to Atmospheric 8 increases its cost by three points; decreasing it from Atmospheric 7 to Atmospheric 6 reduces cost by two points; changing from Atmospheric to Surface or to Space isn’t covered by the rules. Pg. 384 applies; pg. 388 doesn’t.
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Increasing a vehicle’s speed from (again, for example) Atmospheric 7 to Atmospheric 8 costs two points, as per page 388; decreasing it by 8 to 7 reduces cost by two points. Changing from Atmospheric to Space costs three points, as per pg. 384; changng from Atmospheric to Surface reduces cost by two points, again as per pg. 384.
I’ve been assuming (1) in my designs so far, but that begs the question of what the rules on page 388 apply to, if not vehicles.