TWS Tuning Technique Series - Ep7: Stubby shapes, why for who and when windsurfing

A series of instructional videos - TWS (www.tws-windsurf.com) Tuning Technique Series together with wave world champion Victor Fernandez, Head of Fanatic Wave gear R&D Klaas Voget and professional windsurfer Adam Lewis.
In the seventh episode they answered question about new compact shape of wave boards: Stubby. Why they using this kind of board and in which conditions.
Camera & editing: Bartek Jankowski (www.bj-productions.com)

[@adammaj1]

Is it possible to say that stubby x volum has similar planing as fsw y volume ? Is it possible to compare stuby, fsw and fsw stb ?

[@872521]

Interesting.
My 111 lt. Hawk is replaced by the Stubbies and the Blast.
Optically I like the Hawk and it is a blast [sorry] to sail.

[@adammaj1]

what about grip ? How to choose board size ?