Spirited designs driven by innovation. we design state of the art catamarans and supply technologically advanced light-weight kit packages to suit diy enthusiasts.. Originally built in 1897, this beautiful example of riverboat building has been completely restored and currently offers cruises from the mannum dock. while this riverboat was built over a century ago, nearby the long tradition of building fine boats and houseboats lives on.. Some years ago – early 1990’s – i got a catalogue from build-a-boat in australia with a lot of boatplans for sale for wood, steel, grp, etc. they had yachts, houseboats, working boats, canoe’s and what-not of all sizes..