J/30 Class Association Forums J/30 Forum One Design Class Rules Rules Implication for Replacement Rig Rite Jib Box Assembly

So OK ... now you guys may have a problem ... At some point it appears that kenyon changed the boxes it installed in the mast ... from a 12 screw version to the 4 screw version.

I am thinking it may have been on the last 100 or so j30s often referred to as the 500 series.

The question then seems to be ... if both are "original equipment" they should then be legally interchangeable?

526 was measured for forestay at 2010 NA and it was not a problem .


From memory I think that 505 also has the 4 screw box.

photo of box on 348/349 vintage