Hello, I've been a long time lurker in the DB forum, primarily because I have no DB yet (but will in 2 weeks, woohoo! ) and because every information/lesson/whatever stuff I need has been discussed already... until now. Just 2 questions actually: 1. What are the advantages / disadvantages of a 3/4 size DB vs. a 7/8 size? There's a thread about sizes already, though it hasn't been answered yet. For uniformity's sake, you can answer at this thread: Sizes of Double Basses (3/4, 7/8, 4/4) 2. What are the advantages / disadvantages of a round back vs. flat back? The bass I'm eyeing right now has a round back, as well as rounded portions in front at about the area of the F-holes. And also, an extra question that doesn't really need immediate answer: The DB I mentioned has 4 strings, however, at the "headstock" (sorry I dunno the DB term for it ) there's an extra slot for another, 5th tuner! The owner said it was once a 5-string DB. Of course the FB, bridge and tailpiece have all been converted for 4-string. My question is, are all 4-string DBs convertible to 5-string or should the DB be structurally designed to handle 5 strings? Thanks in advance!