It took approximately 11 hours to build and a lot of concentration to manage to build it. The destroyer took about 5 attempts to make and it was built at my mums house (I live with my grandparents).The lego was given to me as a gift which I had wanted for my birthday. There were many hard chalenges I had to overcome, The hardest being sitting down and concentrating. One of the questions I had when I was building it was how do the designers make the blueprints and the model for such a complex design.Please vote and follow me. If you have a 3DS or 3DS XL I'm happy to trade friend codes with you.