I saw that repair and didn't bother to reply in that thread, but my take was that this probably wasn't anything devious, just a crappy repair. Remember, the goal of any good repair is to make it disappear, so in this case, the repairer did OK on making it look OK, just failed on the structural/materials part.
The half cut plastic pipe that seemed to get people excited was probably just a way to provide shape and support for the repair, it just looked like the layup was all wrong and probably polyester resin rather than epoxy was used so there was very poor bonding of the repair to the original layup. It was interesting in that it appeared to be damage to a part of the box that should not be loaded by a collision at sea, so was quite possibly incurred while being moved on the hard with the daggerboard partially down. Most well designed daggerboard systems will have the daggerboard break long before the case is compromised in a collision.
With respect to HP, in my experience the simpler things are, generally the easier they are to repair, which is a big plus for the HP. But otherwise, just like any repair in any structure, you need some skill and experience with the materials and the engineering of the structure to effectively repair it. I can't see anything specific about a HP with respect to repairing or holing that requires special consideration. As you point out, owners who have built their boats start out with a significant advantage when it comes to repairing them.
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Posted by: markm@snowgum.com
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