art wrote:

[...]

If you really want a "cast iron" filter, and you have the time to
study/learn the complexities of operation:

http://www.nfilter.org/

Regards,
JS

John Smith wrote:
[...]

Scratch that, just seen that it isn't being maintained anymore and the
installer didn't work which I just downloaded to try ... hmmm, wonder if
anyone ever came up with anything similar?

In its' day, it worked great ...

Regards,
JS