Yep, here is the flat 6 Boxer engine with 6 rod journals, But I must disagree with your view that the Honda Goldwing flat six only has three rod journals as you can clearly see in the pic below the one of the Boxer engine. Also that is why one side of the F6B engine is offset front to back due to the pistons not being evenly across with each other.
Attachment 5812
Attachment 5813
http://www.maxsalvage.com/servlet/th...GL-1800/Detail