You've read the title, it has to be done by you, not by a local tech, it doesn't matter if it is all-passive, really simple one, or if it is a super complicated active-18v-preamp wiring job...
If you like to keep things clean on your Bass, then i guess you don't have a mess in your electronics!
NOTE: shielding also counts
Come on, post 'em

and of course, keep on playing people!
Cheers
Punkster.