@ Xing: Upload what you have on developer board submission forums. Then we can check the files and make custom hitboxes. They also might go with resized vanilla ones. Unfortunately there is none which fits the fighter shape, while destroyer and BC seems good to go using resized vanilla ones.
If you could provide the models coded, means shiparch.ini, goods.ini and infocard in .txt file format.
Simply use the general templates Igiss has posted on dev board. Values will be changed in balancing process anyway.
Most important is to have something to implement and to balance. Hitboxes can be made later.