I'm looking at the 11a Dual Brick model for $599. I know after doing a lot of research that all of this is easily made. However, I think having one delivered to your door that has already been designed and used on a diesel truck would be better for me as time is my most precious commodity. I'm real close to buying one. I think a few weeks or so and I'll buying. I want to do a little more looking around and reading up. Edit: Sorry, the site is Tnhybrids.com