Hot-end insulation for Raise3D single extruder printers N1/N2/N2+.

This modification insulates the hot-end very effectively (3 x 1 mm ceramic fiber insulation on all sides of hot-end) and reduces the radiative heat transfer from the hot-end to the printed model.
The power needed to heat the hot-end is significantly reduced and the fans ability to cool the cold side of the hot-end is much better, thereby reducing the risk of soft filament clogging in the PTFE pipe. The stronger model blower is very useful for printing PLA.

The modification requires some meta