The one I made was made from pieces I drug out of junkpiles and welded together, --- but works and I didnt use any plans on mine.
I have seen some nice work done when building them. The main thing is to make sure you put grease zerks in the bushings so they can be kept greased.

"A machine you build yourself is a vote for a different way of life. There are things you have to earn with your hands."