About this 3D model

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. =================Update 20/04/2020added a NoGap version, much more robust. does not break as easily. Blender 2.8 file included.