The tube is almost impossible to get to just to put it back in place, so getting in there with a clamp or twist-tie is going to be really difficult. Even with the reservoir out of the VX I don't think that the tube is long enough to pull it to a more spacious area to do the clamp.
Guess I'll have to get inventive, or grow a second elbow so I can get my arm contorted in there.
"The major difference between a thing that might go wrong and a thing that cannot possibly go wrong is that when a thing that cannot possibly go wrong goes wrong, it usually turns out to be impossible to get at or repair."
-Douglas Adams, Mostly Harmless