I'm having some problems with my Nordstrand J5 pickups. The pole pieces seem to be staggered to fit a 20" radius but my Warmoth Deluxe J is a 10". There is a noticable difference in volume on the outer strings compared to the middle ones, and it's getting to be a pain. Can anyone guide me towards pickups for a 5-string J-type bass that are still in production (or at least somehow obtainable if not), or else pickups that are staggered closer to a 10" string crescent? String spacing is about 16,5-17mm. I've looked and looked some more but seen nothing - except the Ken Smith soapbars but their recommended string spacing is just a tad too wide for my specs.