Can anybody give me any more information regarding why the dominant eye should determine stance. 

What is thinking behind this? 

Cheers,

When you're throwing your rear hand you're looking straight down the barrel, it's about accuracy.  You want your peripheral vision to be strongest at the front, your less dominate eye is better in that regard. 

When you're throwing your rear hand you're looking straight down the barrel, it's about accuracy.  You want your peripheral vision to be strongest at the front, your less dominate eye is better in that regard.