Bowden tube stuck on coupling collet

[Moe1992 1]

Hey guys and girls,

I need some help, my bowden tube is being held by the coupling collet at the feeder side. I cant get it out.

I removed the blue clamp clip, pressed down the coupling collet and pull on the tube but it won't come out... What should I do? I am replacing the tube. Since I don't really need it afterwards it wouldn't be too bad if it gets destroyed. Nevertheless I'd like it not to.

Furthermore I am using a custom feeder (IRobertI), look at the picture .

Thanks in advance!

Moe