I am not much of a carpenter either but I figured out how to build one so all the pieces fit. I build the base first on the elevator brackets. Then build front wall and attach to base. Side wall gets built straight off the base and front wall and attached. Repeat with other side then same thing on rear.Basically after front wall almost all the measurements come from just marking cut by the base and whatever it attaches too, if that makes any sense. No tape measure needed much. I built one using carpentry and a tape and the pieces did not match up as good as I would have liked. But I can get one tight doing it my way.