Dingwall question-Dingwall answer......
The FD pickups are considered split coils, and are like little pbass pickups under a large soap bar cover. They are definately hum cancelling (incredibly low noise) and best of all they are passive.
If you want to hear them in action check out
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or over at basstasters.com
I would only guess the 4 string p'ups are smaller than the 5 string ones, as Sheldon makes both a 4 string and 5 string p'up- so there must be a difference
A pickup that sounds similar to a Dingwall...hummm maybe a skjold custom pickup- i found it to sound incredibly similar
frank