Search reveals a thousand oblique references, but no real serious rundown that I can find. I ordered a new 099-2123-000 set from Amazon the other day on impulse because they were on sale for $62 (of course, Amazon's sourcing being what it is, they'll probably be broken in half with a sheetrock screw driven in them) and I thought they might be an improvement over the 58358/9 pickup set. This is probably the #1 selling set of replacement "upgrade" pickups for the Jazz, so someone must have a really expert, lab-coat analysis of them by now. I have some specific questions, but they'll wait until I see where this goes. You know, these guys: Thanks for any hard data, good links, whatever!