You are over complicating it...
I run a 100 yrds or so of 10lb mono backing then fill the rest of the reel up until about an 8th of an inch from the top. Currently running 8lb Drennan Super Specialist.
Run your mainline down to a small barrel swivel, then your flouro lead (length depends on conditions)
BTW, Siglon F is like rope, it's cool to see it in the water, but I found it a complete pain in the butt. No matter what line you use, if you are doing a sidecast, you'll get line twist.. Unless you learn one of the other casting methods (Wallis or modified pull cast for example) it's inevitable.
Take this with a grain of salt, but this is what I've been taught.