I think you said that you are just running the damper, true? If so I am very concerned about two things. You don't have a regulator and your fuel pressure may be way too high to be safe. You have more of a potential of a leak occurring or even something blowing.
The other is that now you have cut off the ridge on the fuel line. While you do have two clamps, and it may never be an issue, the hose could slide right off. While this was not a fuel line, I give you an example of what can occur. I shortened one of my 2" FMIC pipes and the hose kept blowing off. Now, mind you that this is only 22 pounds of boost, but no matter what I tried (like two clamps) I could not keep the rubber from sliding off. This, because the rolled bead was missing.