Madhouse lined up with butyl rubber ...it was tedious work.
Now we started with polyester lining of the enclosures ..
We needed a 2 meter length to line the two enclosures
Opening the bag of polyester balls ... this much stuff weighs only 1.5 kg ...
Now the polyester mater has to be kept in its place ... it is important to prevent its flying around in the sub
We used a thin wire mesh ..