I've started to get my parts for my hydro grow this winter. I have the boxes, clay balls and pump, but I have some questions about the inlet.

In the guide: http://fatalii.net/growing/index.php?option=com_content&task=view&id=118&Itemid=69 (http://fatalii.net/growing/index.php?option=com_content&task=view&id=118&Itemid=69)
...there is an inlet with a roster net installed http://fatalii.net/ebb/_thru_parts1.jpg (http://fatalii.net/ebb/_thru_parts1.jpg)
I've just bought an inlet (läpivienti) from K-Rauta, but I was wondering how to install the roster net since the top part of the inlet isn't removable. Did you cut and super-glue your net inside the hole perhaps, or did you buy a inlet which has a removable top?

Thanks.