Dents and bumps are usually symptoms on a crushed core due to unexpected local loads (like walking on your knees over the foredeck etc.) A solid glass boat will not have these issues, but a sandwich construction will be lighter and stiffer than monolithic glass hulls. Our Tornado with much paper honeycomb sandwich construction is very prone to dents while a high-density foam will be less exposed to dents. A wood core will not dent at all <img src="http://www.catsailor.com/forums/images/graemlins/smile.gif" alt="" /> As always it is a compromise, this time between stiffness/weight/cost of construction.

BTW: As Wouter have said many times on this forum (and I guess this is the gist behind Robis initial comment, becouse this have been discussed many times here). A heavier boat does not necessarily have to be stronger/longer lasting than a light boat. A heavier boat see much larger loads on the whole structure, so in practice an 75kg A-cat might last longer than a 200kg boat. It is all down to how the structural design is done and the intended use. Even the Hobie16 need a keel-job after numerous beachings.

Making the first posts might be a bit intimidating, so kudos to everybody who make it out of the closet. It is much easier to ask than reinventing everything yourself. Besides, I guess most here are more than happy to chat about our sport and answer any question about catsailing. It's all part of building a community, just look at the "Tornado replacement" thread and how they search for the magic ingredients to grow catsailing (the solution is of course to build a heterogeneous society where cruisers, fun-in-the-sun, racers and everybody have fun sailing and socializing).