I recently bought a Bongo 5er as a possible replacement for my L2000. I really like it, but there are some things I find could be improved. I think I'm going to sell it and get a four string version, but I'm interested in some differences. A) Possibility of getting the Pau whatever board instead of a rosewood for a fretted? B) Are the four string necks the same string spacing as the 5 string necks? C) If I end up going with a 5er instead, do they make nuts for people that tune EADGC? That's all I guess.