I've been installing DiMarzios since the mid 70's, mainly in guitars, but my next project (J Bass) will have either a nUltra or a Model J at the neck.
It's still in bits & the pickguard needs a *lot* of work, but I have an Ultrajazz for the bridge and a Bill Lawrence EB50PB twin rails humbucker for the mid position. Both will be hard-wired in series mode.
When the weather gets warm enough for me to spend time in the workshop I'll put it together & do pics.

