On Feb 16, 8:08 pm, "a2retro" <a2re...@a2central.com.remove-yz6-this> wrote: > Tony, is this the idea? > > http://www.robotshop.se/catalog/images/bs2-ic.jpg That would be the idea. It's an open hybrid on the inside, very similar to looking into an EPROM, on the top side.