I see how the jig is set up , but, what size split ring, solid ring and swivel are you using?
Owner Hyper Wire split ring, I want to say #8 and around 150 lb rated? I always throw out the packages as they take up too much space in my box. They have to be heavy as they do fatigue over time opening them to change jigs with the pliers. You WILL need split ring pliers for these. You need even heavier if jigging for Cows.
SPRO swivels rated 500#
Assist cord is 500#
Hook should be slightly wider than jig, in a general sense.
All of this is extra heavy for multiple use on many fish.