He’s actually discussing Ishto, so it has nothing to do with Histaklus.
As I demonstrated, they have mostly the same parameters.
I’ve seen the ???? inside. He doesn’t say anything about why the Issur exists, and if it is only because at the time of the Gemorah it was a Makom Mechusah.
I haven’t, but I’ll go with the ???? ???.
I don’t see where you are talking about
?.
http://www.hebrewbooks.org/pdfpager.aspx?req=14243&st=&pgnum=153&hilite=
http://www.hebrewbooks.org/pdfpager.aspx?req=14243&st=&pgnum=154&hilite=