I noticed these a few months back...
http://www.wdmusicproducts.com/Merchant2/merchant.mv?Screen=PROD&Store_Code=WMPI&Product_Code=WPU900CR&Category_Code=P90FMLY
[isn't 9k a bit high for a 90?..oh well..]
other manufacturers have them..memory escapes me again..
If i'm thinking about pickups it must be time to lie down.
Yours VERY Intermitently...don't ask! :D
Accuracy,you say? hmm interesting concept..