On the website of a Dutch builder I saw them advertise a series 'dial' option for a jazz bass model that was described as: allowing you to gradually blending in the bridge pickup in series. I've been trying to figure out how to do this and can't think of a good way. It should be possible to use a pot to blend between ground and the hot output of the bridge pickup. Problem is in the middle it will just lower the overall volume unless the pot value is so low it will almost short the bridge pickup. I'm not sure how usefull the option would be. For the moment I'm mainly interessted in solving the puzzle. Any idea's?