it sounds to me as if you have already answered your own question. if you suspect the boat was damaged by a grounding, you will always have a doubt about it's soundness. it is good that you know enough about boats to perform your own survey. there are good surveyors out there and some not so good, a friend purchased an atkins wooden boat in san francisco
based on a good survey. we left san francisco
heading south for long beach and the keel bolts
broke the second day out, the keel dropped over a foot at the bow but remained connected at the stern, allowing what is supposed to stay out of the boat in. thanks to some quick action by all three of us on board we stuffed the gaping hole with cushions
, plastic. clothing
and anything else that would stem the flow. the coast guard reacted quickly and we were able to tow the boat in to monterey pumping the whole time. we were lucky as most of the keel boats were nearly rusted through, had the whole keel dropped off we would have turned turtle and sunk. we had the boat moved by land to san pedro and spent the next year replacing frames, etc. on the boat, we saved her at great expense and we did the work ourselves. the surveyor would accept no responsibility, but it was obvious that he did not check the keel bolts
at all, if you really like the boat you are looking at try another surveyor and apprise him of your concerns. maybe it is nothing and maybe it isn't. point is, don't base your purchase
on one man's word.