Er yeah what ↑↑↑↑ he said. There are recesses in the deep state that cause the wide C bearing to be effectively “cut down” to narrow C bearing size. Put in an actual narrow bearing and I expect the gap would be so tiny it’d be unusable!
Tried it out. 1/2 spec doesn’t work, the Side Effects bottom out to keep it tight enough while playing. Though I got a couple of loops in, the gap isn’t any tighter than a looping Yo.