Hey Pit!
I had a broken front beam last year with my Nacra 5.7
Ik putted a helicoil into the hull and now the bolt is holding very tight :)
Check the link on youtube!
http://www.youtube.com/watch?v=RFYa6sjhh_E
Hope i answered u'r question :)
Grtz
Sander
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Nacra 5.7 spi 93
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