Hello there Jon!
I had wondered about fitting one of the original box filters as I had recently seen one chromed and it looked smart. 8) Mine is the chromed round one, looks nice but too many about now. Think i'll get an original. Trouble is all the ones I have seen seem expensive, when I was not looking they were two a penny.
As far as filters go.... As no one can see inside the housing, I'd have thought it would be ok to have a piece of half inch foam in there. I dont know what the seating for the filter is like but I'm sure that one could make something up. Let us know how you get on.
P.S... Anyone got a filter in their shed that they dont want?
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