Any ships in your fleet which already have the pre-engineered Heat Sink Launcher with double Ammo Capacity fitted will be displayed with the correct stats for the Heat Sink Launcher except the mass, which is displayed as 2.6 T, i.e. the mass of the original Heat Sink Launcher engineered with Ammo Capacity.
Likewise if you save that ship loadout on EDSY, when you reload it you will note the mass is showing 2.6 T.
Any ships in your fleet which already have the pre-engineered Heat Sink Launcher with double Ammo Capacity fitted will be displayed with the correct stats for the Heat Sink Launcher except the mass, which is displayed as 2.6 T, i.e. the mass of the original Heat Sink Launcher engineered with Ammo Capacity.
Likewise if you save that ship loadout on EDSY, when you reload it you will note the mass is showing 2.6 T.