Dear Charlie,

A picture is rarely worth a thousand words. Words can hurt as you have expressed.

Putting all that aside, I can say that the execution of whatever the hell it is looks very impressive.

And if the work is in fact as impressive as it appears then you have little to fear vis a vis E&O claims.

I have encountered some high tech construction that you won't find "show and tells" about in the JLC or text books, etc. and after a limited amount of studying came to the conclusion that all is well. Your risk of derision, repudiation, and other forms of humiliation ( and legal action leading to serious monetary damage ) is much greater if you call into question something that appears to be professionally and exquisitely engineered as opposed to demurring that it is probably all right; but you can say to your client, <if you want further assurances and don't mind spending money go ahead and get a second opinion.> ( Better to keep your mouth shut and be suspected of being a fool, than to open it and leave no doubt --Samuel Clemmens )