I've gone through the search engine, and come up with some decent info, but I'm looking for specific experiences. My bandmate has a Yamaha BBN5 that I know he'd sell to me for cheap if I asked. It plays pretty well, and I'd like to have a 5 string around. I've heard of people upgrading the electronics with very good results. Has anyone out there done this? If so, what pickups, and what was the final cost/verdict?