Here is what I can tell you about Cavalier Pickups. I truly appreciate their honesty and applaud them for being transparent and straight up. Having never used their pickups I can't speak directly, but knowing what they use ( having used it myself ) and from what I have heard, they are legit. They use Tone Kraft parts to make their pickups. Tone Kraft is a company that sells kits, parts, and other supplies to make pickups among other things. So you are buying a Tone Kraft pickup that Cavalier then winds however they wind it. I have successfully ( and recently ) made a pickup using Tone Kraft supplies that sounds damn near exactly like a Jerry Donahue. There was another post recently where it was debated about how much magic if any was needed to make a pickup design. I contend that while there are variables, there is no real magic. So that being said, my recipe for a JD sounding pickup was a 50's Vintage Tele kit with A2 magnets. I used 10,000 wraps of 42awg wire. Comparing to Cavalier's description, I can say that his will definitely be fat and may border on dark sounding. I feel the JD and even my rendition of it can do twang convincingly enough but is definitely more rock, blues, jazz and hot country. With an extra 1,000 winds, it will certainly be rounder, darker, and more grunty, or smokey if you will, even with A5 mags. I feel the A5 mags is what gives the Tele it's chirp and twang, A2 just knocks a little of that sharpness off the top and the extra winds fattens up the pickup and rounds it out a little more. You get that twang, some bite, and a solid mid-range growl that makes a Jerry Donahue pickup so famous. I feel 11,000 wraps is heading north of medium output and perhaps quite literally high output, and with 42awg wire, 11,300 wraps is probably a DCR of about 8.5 possibly even 8.7. You have to wind pretty tight to get that many wraps on a bobbin and still leave room for the twine wrapping.
Congrats on your choice and please do get back to us about your thoughts. Supporting the little guys is always commendable!