All models need to be printed (except the last one) and glued together, you can glue the Z-carriage at every height you like.
It uses M4x7mm.
Scale: 1cm = 1mm
Infill: 100%
Material: PLA (or any other)
Supports: Yes
Ironing: Yes (try it, it is awesome)
The author hasn't provided the model origin yet.