I have been thinking about doing this ever since I saw this one, a couple years ago. Since I already have the splitter and enough metal laying in the scrap pile, it shouldnt take much money to covert my 6way adjustable to the fixed 4 way like in the video. I am just having a hard time deciding how far apart to space the 3 upright wedges. The top horizonal wedge will be 5inches and I am thinking trying to space the knifes so the splits are 4x5. To big, to small?? I'll probably just use the regular control valve since all the hydraulics will stay intact, but do plan a auto cycle valve in the future. I think this design will save me a lot of heavy work since I usually split big wood that always needs resplitting, even with the current 6way.