So, in a strange turn of events I picked up a Candy Apple Red Cabronita recently. I had previous experience of these pickups in a Coronado and wasn't impressed but in this bass I really like it. I'm assuming the Coronado semi hollow style was more of a factor than I thought.
The fidelitron pickup is adjustable in overall height and also has adjustable pole pieces too. I set the pole pieces low in the pickup and then adjusted the pickup height to around 5/32" from top of pole piece to underside of string. I don't get any farty noise - I find it quite similar to a Precision. @ubit have you tried adjusting the pole pieces individually? Set low, I find they are more low middy, but raised up (with an appropriate reduction in pickup body height) they are brighter.