I'm interested in building a bass with these pickups, but the information out there is pretty scarce. Can anyone help me with my questions? 1. It appears that there are single coil versions as well as humbuckers, but I've only seen one place that sells them (bestbassgear.com). They only sell single coils. So, is it true that there are humbuckers? If so, where do you get them? 2. Bestbassgear sells the single coils for $230, but I've seen some used ones sell for $70. That's a pretty big drop in value. Are the Chi Sonics not all that good? Why the poor resale values? 3. What type of routing template works with the Chi Sonics? Even though Bestbassgear sells the pickups and some routing templates, they don't have a template specifically for the Chi Sonics. Will another one work? I realize these are odd questions, but any help would be appreciated.