About 25 cm of extra length was added to the tail over two modifications, giving more lift for takeoff without excessive pumping.
The longer tail and more forward foil create a downwind-style feel with improved glide and stability similar to a more conventional big board, while still retaining a small area nose that feels great, thanks to reduced swing weight and less buffeting when flying upwind.
At 90kgs I can now uphaul it without much anxiety 
At 191 x 65 cm the board feels efficient and balanced, and the added tail area is essentially free - once up on foil, it isn't noticeable.
Testament to Mark Oz's board building skills that this is his first windfoil custom build - used for hundreds of sessions by Mr Smooth and me over 3 years yet still structurally perfect to be worth modifying 
Yes it is. The bottom pic doesn't make it look like much was added but it is quite a lot. That rear most strap hole was about 100mm from tail
Select to expand quoteazymuth said..
About 25 cm of extra length was added to the tail over two modifications, giving more lift for takeoff without excessive pumping.
The longer tail and more forward foil create a downwind-style feel with improved glide and stability similar to a more conventional big board, while still retaining a small area nose that feels great, thanks to reduced swing weight and less buffeting when flying upwind.
At 90kgs I can now uphaul it without much anxiety
At 191 x 65 cm the board feels efficient and balanced, and the added tail area is essentially free - once up on foil, it isn't noticeable.
Testament to Mark Oz's board building skills that this is his first windfoil custom build - used for hundreds of sessions by Mr Smooth and me over 3 years yet still structurally perfect to be worth modifying
That boards getting closer to looking like my Severne Alien!!
I love it! I had similar results with similar modifications. Gotta love it when a mod improves performance AND is easier to use!
There is another benefit that's the SUP downwinders talk about but windfoilers rarely do. When you put weight and volume behind the front wing it helps move the center of gravity of the board closer to the front wing. This helps balance pitch. When the CG of the board is over the front wing it is one less thing that you and the stab have to compensate for.
It is cool seeing Simon's current set up next to your adaption of his old board, the same but different! It would be interesting for him to ride it and tell us what he notices about the performance differences. Pick those two boards up by the front wing like the downwinders do, I bet your new mod hangs level and Simons little ripper hangs nose down.
JJ what was your final take on that short wing board you tested? Did that motivate you to try something longer?
I have been reaching for funny names for your board because of all the edits it's gotten. The best I have so far is TRANSFORMER
I can see it in orange letters like the original offering.
Select to expand quoteBender said..azymuth said..
About 25 cm of extra length was added to the tail over two modifications, giving more lift for takeoff without excessive pumping.
The longer tail and more forward foil create a downwind-style feel with improved glide and stability similar to a more conventional big board, while still retaining a small area nose that feels great, thanks to reduced swing weight and less buffeting when flying upwind.
At 90kgs I can now uphaul it without much anxiety
At 191 x 65 cm the board feels efficient and balanced, and the added tail area is essentially free - once up on foil, it isn't noticeable.
Testament to Mark Oz's board building skills that this is his first windfoil custom build - used for hundreds of sessions by Mr Smooth and me over 3 years yet still structurally perfect to be worth modifying
That boards getting closer to looking like my Severne Alien!!
Similar outline but his foil tracks are about a foot further forward.
