Camareo
thingiverse
free
Shelf Support Bracket by Camareos
...f height. maybe not the most lightweight or elegant method, but it works and is stable. i used petg with 2 shells and 25% infill.
thingiverse
free
Mk8 Extruder Fan Mount by Camareos
...lso hold fans of different sizes, but in this case, the curvature of the fan mount will not align perfectly with the fan housing.