Fin size for Blast LTD 100 (2021)

    Hi all,
    I ride a Fanatic Blast LTD 100 (2021 Rat Edition, 62 cm wide) and I'm looking for a new fin to get more speed.
    About me:
    - Weight: 68–70 kg
    - Main sail: 6.4 m², also 5.5/5.2 when it picks up, 4.7 when very windy
    - Open sea, no weed
    - Current fin: 38 cm freeride, which I've been told is too long for me
    I'm considering the Gunsails Race (G10). Their chart (based on 80 kg) suggests 320 for 100 L / 6.5 m², so about 300 for my weight. But the Blast is narrow, and by width the chart would say 280.
    Questions:
    1. For my weight and sails, would you go 300 or 320 with a race fin on this board?
    2. Any experience with the Gunsails Race fin, or would you recommend something else in a similar price range (e.g. Select Edge)?
    Thanks!

    Hi,
    I'm (68 kg) riding my Blast 100 also with 6.4, 5.2 and 4.7.
    Using Maui Ultra Fins SL-P 32 cm and 30 cm and works perfect for me.
    32 cm for 6.4, 30 cm for 5.2 and 4.7.
    A 28 cm MUF G10 was too small for me, much more sensitive.
    A 29 cm Select Edge G10 was OK, was extremly powerful, had much backfoot pressure with this Fin especially downwind.