Hi, first time assembly is always going to take longer than when you're used to it and have it off to pat. Assembly of the MiniCat 460 can be achieved in about 40 mins, but for sure first time will take you a bit longer. Also depends on whether you're using an electric pump or hand pump for the floats. Take a look at www.minicatamaran.eu for more details. Cheers Team MiniCat