In this interview with Marc Maron, at about 1:04:08 Kim says she had a studio back at her house and used a 1/2" 8-track by Tascam. In a different interview she had with StereoGum.com, she mentions the 8-track again.
"So I always had a studio, even when I was a teenager living at home. I had a Tascam 38 8-track. I would make my own cords and solder them. I’d buy a spool of cable and make my own cords. I had all these patches that I created and it got ridiculously complicated. I still kind of do that all the time."