The inner cabin is too small? Don't worry. The Gear Condenser will help you out.

Some inner gears of higher level may cover too much space of the inner cabin. By condensing, these gears will be smaller. There will be more space for other important gears, such as cores and various kinds of modules.

There are five grades of gear condensing. The higher the grade, the less space the gear will cover. It will cost an items to condense.
Grade A & Grade B ---- A Meteor
Grade C & Grade D ---- A Red Star
Grade E ---- A Blue Star

Items that can be condensed:
Engine (Level 175, 180, 185)
Cabin (Level 170, 180, 185)
HP Module (Level 177, 180, 185)
Energy Module (Level 178, 180, 185)