Well, essentially I want more options and variety than adding specific parts of ship gear. Not everything that might be important about a ship is always the ship components themselves. There were a number of interesting examples on that table I referred to (and some in other books). Some of them I can see being buy able improvements to ships, while others might be due to how well a ship was maintained or abused, while others are tied to the reputation and history of the ship.
I can see a luxurious starship being an option one can buy, increasing the costs of staterooms and other passenger service components. Maybe one could buy a Darrian fusion P-Plant which are supposed to fuel efficient (and thus get a reduction in P-Plant fuel consumption).
Things like maintenance cost reduction because a ship was well maintained would be a bit more trickier. I'm not sure how to reduce maintenance costs of a brand new ship (which in theory should be in perfect condition), nor am I sure how to get to a point where a well maintained old ship requires less maintenance than a new ship. I don't want to require a skill check every month to keep maintenance costs down. Maybe having skill ranks in enough skills (and have enough crew to do the work) will keep things in optimal condition (like having skill of 1 in each of the engineering specialties will get a 5% reduction in overall maintenance costs)? Maybe spending money on quality components that will last a long time will reduce maintenance costs in the long run?
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Basically, the point of me making this thread was to ask if this work has been done already, or would it be something I would have to make up?