Identifying a low-white calico

[snakesRkewl]

Perhaps when I have the means to do so, I will experiment with selectively breeding low white vs high white pieds. I have a hard time believing (even if it is true) that you can't selectively breed for low white or high white animals to some extent.

Experiment away, nothing wrong with that, it's a hobby and if it drives you to try to figure it out, awesome.
Just remember, the pied gene has been there and done that, as has the calico/sugars, they've both been around the block a few times with lots of results from breeding highs and lows.

It definitely is all of the other traits you want to be "quality", no arguments there.