redneck sucker sock
bud, i posted the link to the pic of mine in my readers rigs album, on p 2 of this thread. i had access to some 6" orthopaedic stockinette. i just whacked off a chunk, and stretched it over the BHAF. so far, i love it. should easily triple the life of the filter, without compromising air flow. moparguy ("discovered" the filter), is getting ready to run his with a filter minder with and without the sock, to see if it makes significant restriction. i'll be very surprised if it does..... i can buy more of the stockinette if there is enough interest. it would cost me a little over a buck a linear yard. it prolly takes about 2 feet to cover the BHAF--when you stretch it to go over the filter, you lose length... .