904 torque converter recommendations

The blue one in post 20 is like the other side of your orange one in post 21, correct?

Then it's externally balanced.
Yes, exactly. So, the fact that mine has those 3 machined circle divets on the back side. Even though it doesn’t have the moon shaped machined groove on the front. Confirms it’s externally balanced for a 360 ? Because a 318 is not externally balanced. A 318 balancer should have no moon or circle machined grooves for balancing on either side, correct ? A 318 should be completely flat on both sides ? That’s my thinking anyhow.