Filament Joiner with print-in-place hinge

Hi, I remade this model put with a print-in place hinge.  I added my fusion 360 file which is parametric - meaning if the print in place is too tight, you can make it “lose” in the model. Look at the image referring to that (file: Filament Joiner with print-in-place hinge.f3d)

I failed to understand many of the other joiner model where they use a tube.  How do you get rid of the tube once joined?  Anyway.

Print tips:

• Printed it at 0.16 layer height, 3 wall, 25% infill.  No support or brim needed.
• Look at the image where I show which direction to print

Usage tip:

• Goal is to put both filament tips to show in the “hole”.   You melt the one on the “narrower side” and then push it together with the other bit, but push further so both of the ends are inside the “wider part”.
• I found out I can use a small electric screwdriver and heat the tip with a lighter for about 10 sec, then slowly move it very close to the filament tip, and touch it a bit until I see it's getting melted (but not much).  Then I push (don't panic, you can push at normal speed…)
• Finally I squeeze the device and wait 15 sec
• It's a hit and miss - but I mean 5 tries will take you 2 minutes…  
• You can delicately clean the bulge with an exacto knife or a plastic cutter.  (But I broke mine 80% of the time when doing this).  You can also re-heat your screwdriver and lick the wound a bit.
• This join is never really going to be very solid.  Goal is enough so it can pull it into your machine.  It's very fragile at bending.
• This guy made a good video on this: