Very Interesting!
Uplining by two seems a bit high, I've heard of people uplining by one, but two.
But I get your point and this is my experience, the line is too light compared to the WF.

Can the length of the rod, 10feet be a problem, is it better to use a 9 feet?
I gather it's better to use fast rod for a shooting head isn't it?

Thank you tailingloop,
Thorarinn