i am currently awaiting a Seac Sub Asso 115 modified by Maorisub, with 8mm threaded shaft and Devotosub Tuna sliptip.
My buddy is also bringing a selection of Riffe sliptips from the states.
I also have the 19mm bands already tied ready for the Tahtiti.
I am sure one of the two setups will work
As Fernando mentioned, a fractionated bouy system is your best bet.
The tuna's heart and muscle fibres are designed for hardcore endurance and are a lot more resistant than AJ. IF you value that tender do not use it as the first bouy. Get a couple of small ones in front to slow the beast down.
I guess its gonna be good this summer. Fernando, you and me all vying for a monster.
First one to catch a tuna over 100 kilos this year buys the beer