Anyone who is thinking about the new blocked off nose SUP's should look at the
Windsurfing Stoke Videos thread
AWT Quatro Desert Showdown on Vimeohttp://vimeo.com/71824112#t=0
Check out the cut back at about 2:08 min... in slow motion you can see just how the pulled in nose outline and rocker work together in a way that would hang up in a big way with the blocked off nose design.
I don't want to squash anyone's out of the box thinking or creativity, the 5'-1" X 17.5" surfboard undoubtedly works well in some decent power/size surf, but if you scale that up to an SUP you no longer have just an inch or so of board between the rail and your heel/toe, plus you have another 2'-6" to 3'-0"+ of board in front as well. Having to "workaround the volume to paddle" issue might make this particular road less than optimum for SUP.
The fact that some of the most successful board designer/builders come from a windsurf background is not an accident. Many of these same ideas were tried/tested/and proved wanting 20 + years ago.