Air filters: don't buy Tek and don't go out of your way to findthe
filter material. Head down to your local Dollar General, Dollaris
that undersells Wallyworld and buy the GENERIC Scotchbrite-like(and
the generic green ones don't hold a candle to the real Scotchbrite
Hello Dean,the front top of the "can".element.
I remember the Filter-Kote (milky water-soluble oil?) days for the
metal filters in the 5xx scopes (!) I've been cutting up the
open-cell foam intended for use as filters for air conditioners - for
the 4xx series. It's usually grey and about right thickness to stay
in place. Really cheap too - maybe $1 for a humongous sheet or 2.
After a few washings, just toss and snip out another. (Seen quite a
few 4xx scopes of late - with the filter left out. Maybe they just
Just a thot.