I am having a custom bass build by Norhtwood guitars (my local guy up here in Vancouver BC). It's going to be a 4 string made bolt on. Mahogany body w/ spalted maple top, I forgot what the neckstock is w/ ebony fretboard. I want this baby to really growl. I like that sort of Tool 'pianoy'(if that's of word?) sound, I also dig (Les Claypools sound on Anipop) with lots of bite. I have barts on a Northwood fretless which is smooth (sounds beutiful)so I want this to be the exact opposite, bass from hell. No holes are drilled so, anything is an option. I was thinking Basslines MM replacements with 2 humubkers. But I am also curious about EMG, I've heard that they only sound good with fresh strings. Opinoins? Succes stories? I would appreciate any help. Thanx.