I refinished my Nacra 570 hulls last year and had the same type of "tunnel" going on in the skeg area -- I don't know the purpose of it either. My bes...

MN3 wrote: Chip from whirlwind he is a sailor - been in the business a long time makes a great sail at a very fair price I purchased 3 sails from...

MN3 wrote: Chip from whirlwind he is a sailor - been in the business a long time makes a great sail at a very fair price I purchased 3 sails from...