here the knob that i got from trading old subs that i had kicking around in the basement
http://i654.photobucket.com/albums/u...r/100_4459.jpg
i had to fabricate a sleeve for a tight fit
http://i654.photobucket.com/albums/u...r/100_4463.jpg
before
http://i654.photobucket.com/albums/u...r/100_4464.jpg
old knob out
http://i654.photobucket.com/albums/u...r/100_4465.jpg
after
http://i654.photobucket.com/albums/u...r/100_4466.jpg
http://i654.photobucket.com/albums/u...r/100_4467.jpg