I'm a satisfied owner of a Yamaha BBG4II but it lacks one thing... Low B... Everytime I've tested a 5-string I've had problems adapting to the "extra string". Problem: I need the lower tones... Recently I got the chance to test a Yamaha BBG5 for one song and wow what a feeling! It was like playing my own bass with an extra string. I had no problems to adapt to that 5-string. So now I'm think about trading in my 4-string for that 5-string. What can you tell me about that bass??? I'v read some reviews and they were all very positive but I'd like to have more opinions.