Its been my experience that the initial installation is critical. Bad equipment can be fixed, but a bad install will haunt you forever. I am a small operation and do all my own installations. I am at the site from the time the truck arrives until startup and final testing. Since I sell the equipment, I want to be sure it operates and performs as it is supposed to, and as I told the customer it would. I don't make a whole lot on the install, but then, when the install is done properly, I don't have many warranty issues. I have seen bad installs where the customer has a multitude of problems afterwards, all of which could have been avoided.