So I picked up a used B5 the other day. It us my first Carvin bass, but I have been using Carvin amps for years. I think this bass is bad to the bone and was wondering what others thought about the budget ffriendly bolt on series from Carvin. Being used, mine did require a small bit of setup, but it was also delivered to my doorstep. What are your thoughts on the B4/B5, B40/B50?