I just bought John East J Retro Deluxe preamp for installation in a new bass. I love the preamp but I'm not a big fan of the big heavy chrome knobs. They won't look right with the more traditional bass I'm building. I was wondering if anyone has replaced the knobs and could give me a lead for a good source to purchase a more traditional black plastic set. I found these on the Fender site and I like the way they look but I'm not sure they'll fit the J Retro. Does anyone know? http://www.guitarpartsresource.com/images/large/004-9411-000.jpg Thanks.