Somewhere the instructions tell you to support the fuel line between the fuel selector valve and the fuel pump with foam. I had thought long and hard about this and came up with the idea of using self expanding insulation foam that comes in a can. I built a simple two piece mold that would fit around the fuel line and clamp together with two clecos. The height of the mold was the same as the inside height of the tunnel cover. Once in place I filled it with "Great Stuff" self expanding foam. I cut the top off with a hacksaw blade after the foam hardened and removed the mold. This process was repeated three times and the foam blocks seem to do a great job of holding the fuel line in place. After the first block (blob?) hardened, I took the top I cut off and dumped gas over the top of it to see if it would melt like Styrofoam. That was not the case, your mileage may very. Either way, I don't expect to have fuel in my floorboards.