I see these advertised but I have never actually seen one. I don't think any of the authorized builders have a picture on their websites. So does anybody have 15/6 tube version? What do you think? Have you compared it to the standard 15/6? If so any differences you can here? I know they are supposed to be almost the same but in the real world that doesn't always happen. Do you have pics? I would like to see what it actually looks like.