Calling Mr Mignon

[PositronicRay]

Some years ago I used an extremely useful website detailing how to calculate an air filter size.

I made some filter boxes for my Sunbeam of the correct size, and used some "cut to size foam". Binning the chrome 1"x 5" "sports" pancake filters, resulted in a very noticeable improvement in the top end.

Do you know where I may find the site?

[Mignon]

This perhaps?

https://web.archive.org/web/20110918115057/http://...

[PositronicRay]

Bob on, thank's.