To me it's aboot as accurate as using cake icing.
Alvis 3.1
Useful for artists, also skeptical 'aboot',
, it's usefullness in the word of 'scale' modelling.
Anyhoo, it aint' a '3D Printing' pen, it's a
free-form plastic extrusion device, which has loads
of possibilities when freed from the limitations of terminology.