It kind of varies from day-to-day. at the moment I’m using a bearing called a center track which is flat in the middle and has two 45° angles on either side directing the string towards the center but they’re all flat.

This is a new string for me. This is from a company that went out of business about a year back or so. They were called Bad Wolfe Co. it’s a thicker and heavier string. A couple weeks ago I noticed I had a few I got a couple years ago and thought I should try it out. I’m not really sure what it was called.