Took a little be longer for this line to come up in production, over 100 custom boards shaped first makes a good reason to wait. The two boards have different shapes, single concave for the 75 and double for the 85. We really liked the squashed moon tail and the fins combo. Fast tail rocker makes lots of sense. Fits well in between the two twinfin lines Tempo and Rhythm. Loved in the water from north to south and worked super well in the metro area too. If you have ridden a custom Quatro before this is the closer you can get.