I think the B90 has a standard winding and is not wound for position like the Singles. Awhile back, I asked Jake about doing a bass with 2 B90s because of that 3 B90 bass that JMJ had made. He told me that was just kind of a crazy one-off bass and that the B90 wasn't the type of pickup you put 2 of on a bass. That was about a year ago, so I don't want to say he would still hold to that, but that is what he said at the time and leads me to believe it has a standard winding. Also, the B90 product page doesn't give the option of ordering different types of windings other than the LZN-B90. That said, I am sure he would do a custom wind if asked.