Willie illingworth built the first known mckenzie style drift boat out of aluminum back in the early 70’s. today, willie boats continues to design and build drift. Plans for small portable boats the 1 sheet wedge – it may look like some of my other wedge designs, but it differs in one important aspect; the basic hull is. Specmar inc (previously specialty marine contractors) is an aluminum boat design, lofting, and kt company. we have a large product line including aluminum drift boats.