A knurled handle to make a poker. This can be generally handy, but I've used it to push through stubborn filament clogs (be very careful not to damage your extruder, hot end etc. )

You'll need a 1.8mm rod made from bar steel (example)

Use a little bit of Cyanoacrylate glue to fix the bar inside the hole. Depending on the tolerances of your printer, you may have to bore the hole out just a little with a 1.5mm drill bit.

Recommended print settings:

• 2mm brim
• .1mm layer height
• 3 perimeters
• 5 solid bottom layer