Giu,
Don’t worry about stiffness for now. All masts (aluminum or carbon) on the market have appropriate performance for beginner and intermediate foilers. You only start worry about stiffness for advanced users at the competition or professional level. They are not worth the money at this point for you.
Similarly, you cannot compare the limitations/stiffness of fins to a foil mast, it is simply a different mode of operation (lateral versus vertical loads). Again, any mast on the market would work for you.
I am pretty heavy and I would recommend you to get the biggest wing as you can as (I have 2000cm2 and I recommend at least 1000cm2). You also want to have that is not too short. A mast 75cm or less may feel reassuring but actually will limit your progression. A length of 85 cm is the sweet spot for a beginner.
_________________ Laurent ————————————————————————— Weight: 210lbs, 95kg Level: planning, foiling, no jibe, no waterstart Board: Phantom Iris R Mk2 91, Starboard Foil 144 Foil: Starboard Race range + Starboard Supercruiser range Sail: Phantom Iris Rf 9.0m2 + Neilpryde V8 9.4m2 + Neilpryde V8 flight 8m2 6m2 + Neilpryde Free flight 4.8m2 Playground: Moraine State Park, Erie Presque Isle, Lac Bay Bonaire, Florida Keys
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