About this 3D model

Build your own replica of the famous Taipei 101. Once Taipei 101 was the worlds tallest building and the design is fantastic. Model Volume: 384.87cm3 Model Height (built): 60.53cm (approx) How much material will it use? 230g (This is a rough calculation based on weight per cm3) If the item was completly solid it would take around 2.5 kg so I hollowed out the item to reduce the amount of plastic. I would love some feedback on my model and some possible improvements. Thanks. Ryan