Russ,
I am thinking what tackles and what jigging tecniques to recommend at Canyon Runner fishing seminar in Newport, RI as many jig fishermen in New England are heavily influenced by Shimano Butterfly jigging system and by charter boats guides in Cape Cod Bay who are specialized in light tackles.
You can catch a tuna on a kayak with a great fun, but you can not say a kayak is the best boat to fish tuna.
The problem is tuna can be caught by many different ways of jigging. Anyone who caught tuna only by one specific method believes the method he uses is the best way to catch tuna. Tuna jigging is evolving.
My way of jigiging is not for everybody and it can not be the best way.
Using 200 - 300 g jig doesn't mean you got to use 200 - 300 g rod.
I prefer 400g and 500g jigging rod for tuna.
90 percent of my tuna catches on jigs were made in depth between 80 ft - 150 ft.