I have done over an hour on this
www.oneoceansportsaustralia.com/one-foils/p/1049-ha-all-around which is bit of an all rounder wing but lately I have been using the 1080 Accelerate DW wing
www.oneoceansportsaustralia.com/one-foils/p/accelerate-dw-foil-wings and will do about 5-20 mins each time I'm up, I am 82kg and 49 so I'm sure someone younger could go all day.
Both of these wings are also compatible with the black fuse if that is what you have.
Definitely a thinner mast will help as well as you get into more efficient wings as nothing worse than having a nice fast wing with a draggy mast.
It will take a bit to get used to the faster wings coming of such a big surface area wing but once you get used to the extra glide you can never go back. Just a option without having to change everything anyway??