Hi lego friends, For some time now, I have been working on a fully PF and Pneumatic controlled Excavator. After many long hours of "trial and error" this is what I have accomplished. I researched many different sites to find out the dimmensions of this particular model. Also, it took some time to find out how much power the cylinders needed to produce for a model of this size. As I am a very big fan of www.brickshelf.com, I am really amazed that I am one of the ONLY builders that have "black" tracks (The new track system, seen on the 8275 Bulldozer) on my Excavator. Please let me know what you think. Email me at: jkohli89@hotmail.com Thanks, Jkohli