Can someone help me out? I'm pretty new to spearfishing. I have a 48" Biller or Seahornet, I can't tell what it is. Two questions:

1) what is the benefit/difference between using the holes on the rear of my spearshaft or the slidering that freefloats on the spearshaft? Is there a benefit to having my line attached to the rear of the shaft or front?

2) Is there any reason to have my line doubled over then wraped around the release and back up to the muzzle where it attaches with an oversized rubber band? Is it better to have the line wrapped around the release and muzzle twice?
I bought a kit with mono line from Ocean Rhino. They called it a Speed Load/EZ Stow Kit.