I'm more of a Double Bass player, but a lot of times I play Theatre gigs on electric. Sometimes there are some sub-contra E notes in the book, and I just really dislike playing 5-string bass, which is what I do when there are any sub-contra E notes in the book. The thing is, this is the only time I'll play 5 string, and sometimes it's confusing, i.e. I'll play the lowest string, hoping to hear E, and I get a B instead. I was wondering if any of you have ever seen anything like a Double Bass C-Extension for the Electric Bass. Here is a photo of one if you don't know what I'm talking about. I've looked around but all of my search results end up in Double Bass C-Extensions. A low B-Extension would be neat to have on Electric, perhaps with closers in each additional fret, like some Double Bass versions.