Always wanted a simple tool for joining filament pieces together - when the spool runs low or to join DIY multi color filaments (Easy Multi Color Filament).
I remixed LoboCNC's fine Filament Splicing Jig:
The tool prints without support in both PLA and PETG (tested).
The light gray model is printed in Prusa Silver PLA and the dark Gray is printed in Prusament PETG.
To use the jig, see video and photos.
Note: It is important that the two filament pieces are straight before they are spliced together with the soldering iron. If the filament pieces are curved, they will not be joined properly.
When filaments is joined, clean it using a sharp knife to make an even diameter.
The author remixed this model.