I just want to clarify about what i meant with the Chayei Adam. The Chayei Adam says that “rov” poskim assur even not ksav ashuris, implying that there are those who are mater it. That’s why i highlighted the word “rov”.
I did not mean to say that he holds that rov poskim hold that ksivah is only ksav ashuris, as that is not so.
Chacham did you look up about boneh not attached to the ground?