A solder dispensing pen. Wrap some solder around a pencil, drop the coil of solder in the tube, thread it through the cap, and solder away! If your shirts have a front pocket, that's where the clip comes handy.
This thing was made with Tinkercad. Edit it here
Printer:
Wanhao i3 Duplicator
Rafts:
Doesn't Matter
Supports:
No
Resolution:
0.2 mm
Infill:
Doesn't matter
Notes:
Now is the time to verify your Z wobble... :-)