Repair-Clamps for an old Christmas tree light chain

For nostalgic reasons the old christmas tree light chain needs to be on tree (at least that's what my wife said). The old clamps where broken - time for repair. Warning: this make is quite tricky. If you want to rebuild it, you may have to make some adjustments yourself. And even then, it may be easier to by a new light chain as the clamps are a little shaky.

• The ball joints on the bottom of our light chain candles have a diameter of about 5mm.
• I used the metal springs from old clothespins to add function to the printed clips. 
• After printing first assemble the metal spring.
• Since I chose a very tight design for the ball joint, I had to heat the print again with hot water to be able to insert the ball joint (but even then, i had to use some force).

My print settings

• PETG
• 0.6 mm nozzle
• 0.4 mm layer height
• no support