I was thinking of a version of the Purge Bucket that is closed to block any noise from the inside.
The holes are for 10x3mm magnets, I just glued them in with a hot glue gun.
I also glued in some fleece.
Amazon DE Link:
https://www.amazon.de/dp/B086JPK3GH?psc=1&ref=ppx_yo2ov_dt_b_product_details
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Printing
I printed it standing up with few supports (see pictures).
Prusament Galaxy Black PLA
0.24 Layer Height
Time: 2h53min