#268 Ventilator - round - with cut-out

[OK Hoff]

More as a piece of curiosity, but I needed a customised cut-out today. A ventilator, round on one side, square on the other. Just to prove the customised cut-out is a very useful addition to the automatic cut-out. Relevant .properties for information in case someone might have a similar challenge:
depth#nn=30
doorOrWindow#nn=true
doorOrWindowCutOutShape#nn=M 0.5,0.76 a 0.33,0.3 0 1,1 0.001,0.0 z
doorOrWindowWallThickness#nn=15
doorOrWindowWallDistance#nn=8
ok