What is the best euro-pin extension on the market today?
For both wave sails & also for cambered sails so it needs a bit of grunt (The North Power XT doesn't quite have enough grunt for a 7m race sail).
Suggestions ...... Streamlined, Neil Pryde, North Power XTR/XTi, Gaastra? etc
Until recently I used to be a big convert to the Nth Power xt wit the double pullies for my RS4's as manually dowenhauling would lead to me being able to slice washer of my freckle I was straining that hard.
Recently I've gone over to the NP extension with the angled pullies, can now downhaul just with a cleat with a minimum of fuss and strain
haven't used the nth since.
Do you mean this NP extension - the standard X6 UXT? ...http://www.neilpryde.com/matrix-2009/extensions/x6.html
In my opinion you cant beat the Chinook ones ,
One thing that helps allot is knowing how to loop the ropes CORRECTLY!!
I didnt know how then i took the time to learn one day and it is so much easier to downhaul , none of the ropes rub or frey against eachother... its great!!
Another thing to think about is the hole where the pin goes in,
I had an aeron extension and the hole wore out pretty quickly. ( altho the shop where i got it reckons that it doesnt happen often)
The new aeron Extensions have a metal insert to stop the plastic wearing out , but i dont think its much better. 
