This is my bowden tube holder thingy. My fitting finally gave out and the tube popped out of the fitting. This my solution.This for 1.75. 4mm tubing. Design i made. got idea from reprap forums people using 4mm nuts on tubing to hold.
I twisted a 4mm nut on the outside of the tubbing. Bored out the tubing a little for filament. just thread 4mm nut on there. slide it in the push connector. slip in the whole thing in holder. connect as normal. my tube holds great. no more buying fittings. wala!!