Klir-4 Filter Bypass Fix

This is a fix for the Klir-4 roller filter.

After installing my Klir filter, I found that there isn't enough support for the filter cloth on the sides of the triangular cutouts, which lets water blow out past the cloth, rendering the whole thing useless.

These inserts which are to be glued in, provides more support for the cloth, and does not allow water to blow out past the cloth.