Thank you Hakan. So gybing the spi with twin forestays is no real problem?.. Hmm, interesting..

Perhaps I can explain where the "No excess wearing on the spi, but many others that haven't used the snail complains about it?!" comes from. It is something credited to when Martin Strandberg and Kristian Mattson tested the first Gran Tornado spis. The text can be found here: http://sailmaker.info/tornado.html
As you see, they had the snail up front at the bridal wires.

Btw: I think Gran Segel Malmø have completely forgotten about that webpage.