Internal Ballast vs. External Ballast
I dunno Jeff,I''m no designer but I do know a little about boats and all I can say is,I''ve repaired a few ex.ballested boat keels, have seen in books,mags and in real life the damage to ex. ballasted boats but have never repaired damage seen or heard of damage to in. ballasted boats except for water in the keel and voids.
It seems to me,by what you say, that an ex. ballasted boat has to be ecceptionally well designed to withstand a moderate to severe grounding and there''s just not a whole lot of boats out there like that and thats to bad