Heavy rain has interrupted our evening barbecue yesterday. Work on the prototypes went on until after midnight. Today has started at 9 o'clock and all groups were busy preparing for the expert checkpoint this afternoon. After putting much effort into cabling and programming the devices it is time to also build some nice cases for the prototypes. Saws, screwdrivers and paint became as important as keyboards, mouses and compilers. At 15:30 the experts Sarah and Leo arrived, both PhD students at TUHH. All groups presented their prototypes and received fruitful feedback. Everyone is on a good way to success and just has to finish some final programming tasks, work on their User Interfaces and improve the appearance of their models. We are looking forward to the final tomorrow at 15:30.