WARDY45

So far I’ve removed the line from the engine and tried to push the tubing towards the nut. This stopped air leaks to start with, but when I bend the tubing to run it through the pistol grip it starts to leak again.

How do I stop air from escaping out the back of a foster fitting through the tubing. There’s a slight gap between the tubing and the ridge of the foster fitting which air is escaping through. I’ve thought about putting a bit of super glue on the back of the ridge to stop the tubing from slipping back but I thought I would ask on here first as I don’t want to break anything. I’m new to HPA so any feedback would be much appreciated.