Right, I have got sick of the hum of my Yamaha BB605 and feel like an upgrade in sound so have decided to replace the stock pick-ups. After reading Smashes and the Dr Dimento threads and listening to a few soundclips I have fallen for a pair of five string DiMarzio ultra jasses but just have a few quick questions before I fork out the cash on them. 1) The size looks good, and I am happy to make them fit if necessary but am curious to know if these just fit straight in as a one for one replacement or do they need additional covers (the Dimarzio site doesn't have any images). 2) My bass is active with 5 pots - master vol, bass, treble, pick-up blend, mid, and a mid cut switch - will the PUs work fine with this set up? 3) Will I be able to just take out the stock PUs and swap the wires to the new Ultras or is it more complicated. I am happy with basic soldering but my electronics knowledge is a bit rusty. Cheers for any help in advance.