I built one out of 4x4's but I just got rid of it last week with the 2.5TD that I replaced with the 200TDI. The guy is a friend so I can probably still get the measurements. It was pretty simple though, just lined up 2 4x4 along the long dimension of the edge of the oil pan and then placed the crrossmembers underneath those where they cleared the ends of the pan. IIRC I had to notch the one side where the drain plug was. I put casters on it so I could move it around the garage. It was really stable and worked well.