remix to fit the Micro Swiss heater block
original here https://www.thingiverse.com/thing:3435841
block the air from the hot end fan to go to the bed/print.
One M3x8 screw needed.
the standard version is a tight fit (may melt )
also included a looser version (probably better, will print this when the tight fit version melts....)
for some reason FeeCAD cries when trying to edit this.... so this was modified in blender instead.
added a NoGap version, much more robust. does not break as easily.
Blender 2.8 file included.