RE: Some Streamlined related....
Personally I am still using the same WSH extension that I bought in 1993. Pity they seem no more available.
Just my thought. During my windsurfing experience, I sometimes happened to see people doing long swims in due to "Euro pin" failure. Since those parts are machined steel, failure is somehow a built in feature: no matter how thick, strong or "good" the steel, edges of machined metal may develope cracks and finally break under fatigue. This may not happen much often, but OTOH I have NEVER seen any US cup break and leave someone out at sea. I hope that the Euro pin will never become the standard.