The company engineering these pumps has got one tractor pulling right now, at the moment, trying the system out with great results. It's also a daily driver. For you guys worried about now having enough fuel, he's brought it back for having too much. We are a small company, definately not trying to knock Piers, or any one else... but if anyone is interested in trying such a product, give me a email @ -- email address removed -- The guy that is behind the engineering has his hands in tractor pulling all over the US and overseas. This is not your average, fly-by-night guy, despite what you may think. I have an email ready that answers your questions. Just send your email address, and I'll forward it to you. Also, if you want to see it work in action, I invite you to come to Houston this fall. Truck might break from power, but should be impressive.