I'm having my jbass routed for a precision pickup soon. I started toying with the idea of putting a musicman pickup in the bridge after seeing K Johnson bass on the warmoth gallery page: http://www.warmoth.com/gallery/gallery.cfm?fuseaction=include_jbass I'm thinking of completely passive electronics: single master volume and single tone control, and 1 swith for either p or mm (no blend) selection. I might add another switch later for mm single/series/parallel selection. Are there any disadvantages to this configuration? Would the magnetic force be too great - enough to cause bass "stratitis"? Is there a reason why you don't see this configuration on the market? I've seen j/mm and mm/mm, but not p/mm. Some of you may wonder why I'm mutilating my jbass. Simple - it's mim and it's just the most comfortable body and neck combo. And it gives me an excuse to get an american one later.