Filament (Spool) Extrusion Indicator

Prints in three pieces that snap together. The spindle is keyed to prevent the halves of the "spool" from getting misaligned. Features a strand of filament that you can use as an indicator if you are trying to gauge full rotations of the motor. Mine works with 3 8mm x 3mm magnets. Two almost worked but would slip frequently.

The design expects 0.15mm layers and may struggle with nozzle sizes larger than 0.4mm.

Also makes a great fridge magnet.

Assembly
* Take care when removing the filament print from the bed. The little strand of filament breaks off easily.
* Cut the little built in support off the end of the filament strand.
* I do this with side cutters before removing the print from the build plate.
* Press one magnet into the spindle on the back piece.
* The back is the one that doesn't have a hole all the way through.
* The inside of the spindle is recessed by 1mm. Make sure it's all the way in. there should be about 1mm of space left at the top of the spindl