自分も使ってるIQ 4.5が出てました．
Hotsails MauiからQU4Dセイルが出たことにより，また4本バテンセイルが気になるこのごろ．
Mauisails mutantで検索してみると，
http://www.mauisails.com/forum/viewtopic.php?id=3988
これによると，
MUTANTは半平米セイルを大きくしたパワー感．過去，Mauiで4.2を使う日は片手で数えるほどだったが，今では普通に4.2の軽さを楽しんでいるよ．
Artur Szpunar wrote:
The Mutant is available in 3.8, 4.2, 4.6, 5.1 and 5.6 sizes, however the low aspect ratio outline truely does give the sails the power and planing ability of a Legend about .25sqm larger. So, the 5.1 will easily get you going as soon,if not sooner than a 5.3 Legend and the 4.6 is about half way between a 4.7 and 5.0 Legend in terms of power, but seems to get you planing almost as soon as the 5.0. In the past I could count the number of days I would sail a 4.2 on Maui on one hand but I find I am now regularly enjoying the light weight and agility of the 4.2 Mutant on a regular basis.
The Mutant was originally designed as a modern maneuver oriented wave sail, but has proven to have a quite a wide range of use. The balanced, easily accesible power, soft feel and ultra light and quick handling are characteristics that many wave sailors can appreciate. The sails work great with modern wave boards whether they are multi or single fin.
Aloha,
Artur
↓ これは発表当時の記事
http://www.continentseven.com/2012/03/10/mauisails-new-wave-sail-news/
↓ デザイナーが説明しています
http://www.wwwindsurfing.com/latest-news/2013-mauisails-mutant-4-batten-wave-sail/
↓ MUTANTのrigging guideです．
リーチが落ちすぎないようにdownを引いてoutは15-20mm引く．第３バテン先端はマストのすぐ横に位置する位．