To fix the threes I had to blockedit it and sel crvs and bringtofront.
(But it already apparently had a draworder that worked, but why not on all instances???)
Another thing:
Top view:
Layout:
PDF:
Lines drawn OK on top in Rhino and Layout but not in PDF.
OH! And the man… he is a block that both lines in block and block has thickness sat to default and print has default as 0.35 mm and the PDF is OK, but the Layout shows hairline…