@zerokdegree Yeah, I could see that for sure. I have a tendency to squeeze the bar really hard even when I don't need to (like in squats), and this seems to temporarily flare up some elbow symptoms from time to time. A thicker bar does tend to feel better.
@amn I do hammer curls from time to time. They isolate the brachialis better than standard curls but are overall a weaker elbow flexor than the biceps.