Tranport ship capacity for 4 slot ship is too low

[TBRSIM]

The larger transport ship, the class that can be armed and has 4 land unit slots, has far too low capacity, even less than the medium transport with 3 land unit slots and no armament option. The unmodified (by hammocks etc.) capacity is 1000 tons, this should be at least 1600, more likely 2000. It also has only one upgrade slot, unlike the aforementioned medium transport, which has three. Her it also needs at least two upgrade slots, more likely 4.