Mega dance festival in Red-White-Blue: Olympic Stadium Amsterdam – Strijp-S Eindhoven- Ahoy Rotterdam. All this on the same day, with Holland’s best DJs being flown from one city to the other in helicopters. Rotterdam was given a colossal ship with five enormous, seemingly impossible ‘masts’. How could these top-heavy decorconstructions stay upright? With a stay, like on a proper sailing ship. The masts were put together lying down, provided with decoration and technology, then hoisted up and stabilized with steel mooring-ropes. Steadfast, thanks to Coreworks’ calculation wizards.