.... from the Patrik site
"Refined rail and tail cutouts which have been gradually calculated in order that every board feels similar and just changes in volume. The smaller tail surface reduces drag and trims the board in a more lateral free gliding position wheras the rail cutout trims the board more to the leward side which helps releasing the upwind water pressure and increase acceleration and top speed. The adjustable plates on the sizes 100l and bigger can be adjusted in height. The deeper cutouts have less drag and more top speed whilst the lower cutout depth has increased pressure (lift) in the tail which makes the board riding more flat and helps early planing and control"
I have just got the 110 and have got to sail it once in open bay conditions so far with the plates in. I expect I'll take the cutout plates off on flat water for GPS runs.
So far I have found it an easy slalom board to ride and gybes sweet