I used the open eye style 510 hung from the screw-eye with a split-ring and a barrel swivel, as shown in the Gami ad. A 4/0 510 rigged this way on a K-16 has about the same hangback as a 5/0 siwash hung from double split rings or a 5/0 siwash hung from a barrel swivel alone (requires prying open the screw-eye to attach the swivel).

My limited experience with 510's vs siwash are a wash... they both lose equal percentages of fish. The 510 will lose more of them on the strike.... siwashes will buy you more hookups. Once hooked, I lost ZERO fish on the 510's. We still manage to lose a few siwash hookups during the fight. Overall percentage of strikes that make it to the boat is the same for both hook styles in my experience.

Yukon had excellent luck with the "510's on a rope" that you loop onto the screw-eye.
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"Let every angler who loves to fish think what it would mean to him to find the fish were gone." (Zane Grey)

"If you don't kill them, they will spawn." (Carcassman)


The Keen Eye MD
Long Live the Kings!