Rob Allen MB2 with Deep 5 neck. I bought this bass used. It was a standard MB2 with a lined macassar ebony fingerboard. I liked the bass a lot but was not totally happy with it. I ordered a Deep 5 from Rob intending to upgrade and sell the MB2. As soon as I received the Deep 5 I asked Rob if he had more of the wonderful ebony that he had used for the Deep 5 fingerboard. I sent him the MB2 and he replaced the standard neck with this unlined Deep 5 neck . The sound of the bass improved a lot - more even, punchier, with more sustain and depth. The front is koa. The scale is 35". Weight approximately 6.5lbs.