First pic is the old board, orange board is new. My hope its that the new one surfs similarly to the first one but more turny/whippy/loose because all changes are incremental (the first board turns very nicely btw, not tight, and is a really fast board, more of a power board though that wants more face than waist high surf can offer) But maybe those incremental changes all add up to a very different board - we shall see ...
Also forgot to mention the shaper, Gaelen Fletcher in Olympia, has glassed thousands of Pearson Arrow's so he's run his hands over a lot of really functional boards. This is his third kneeboard.
Both are 5'10's
Differences:
new 17 1/4 x 22 3/4 x 16 5/8; old 17 3/4 x 23 1/8 x 16 1/2
new 2 5/8 thick; old 2 3/4
new wide point 2 inches behind center; old wide point 2 inches in front of center
new entire fin cluster set 1" farther forward, and space between lead and trailing fins reduced by 1/2"
new single concave through out, 3/8's nose and tail 1/4 center; old 1/4 nose then 3'8's+ through tail.
similar rocker profiles - new board has 2 inch tail rocker, old had 1.25. This gain is tail rocker is all in the last foot of the tail except for 1/8 inch. 1/2 inch more nose rocker, all in the tip flip.
Same 6, 6, 4 ounce patch glass
new tail built a little more for turning, old for flying down the line

New board is symmetrical - just didn't hold the camera quite right



