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The big heights in the house looks great, but it has a dark side. The spiders in the upper corners. It is not easy to remove spider nets from 5m height. Either you need a big expandable ladder (what I hate) or something expand your arm to such length.
I chosen the second option.
Bought three 2m length aluminum pipes, 30, 25 and 20mm diameter, and designed this:
Printed it in four versions. Two pieces in one set:
Assembled (one set: eight M4x45 screws, eight M4 nuts, one M6 nut, one M6x15 thumbscrew):
How does it look like when expanded:
Let's tremble spiders! I'm coming!