Adamovic Jupiter Custom Bass   Nikola Adamovic is IMO one of the very best luthiers anywhere. I have owned everything from Alembic to Zon and this is the best fretted 6-string bass I have every played. However, I am going to switch to playing fretless bass exclusively and I am having built a wonderful Adamovic 6 fretless, so this one is for sale. The bass is very responsive and plays great. The most special feature about Adamovic basses is the building of the neck, it takes t