I have used several auxiliary fuel tanks with my GT-200. Two have been temporarily mounted and one has been permanently mounted. The first two were 2.5 and a 6.0 Gallon respectfully. The permanent mount is a 2.25 Gallon Plastic "Tour Tank", originally sold as a "Wind Bag" prior to being re-named. It appeared like a "Bed Roll" when it was available in the plastic version but now is sold as an Aluminum Tank with two options to make it appear as a "Bed Role" or whatever. My original's canvas cover began to rot so I decided to take off the canvas cover and just re-mount the plastic tank. I do not have access to a Digital Camera all the time so the original install was undocumented. As a result I documented the "uninstall" of the original in hopes of properly identifying what I had previously done. In addition, I chose to replace the fuel line I installed originally. The fuel line I chose at that time became very brittle and I was concerned about having a leak as the result of its brittleness. The pictures I will include are just that, pictures. I'm still learning to make / modify them to better explain what I did.