Consider this:

Manufacturer A produces a 3D printer and sells it without a glass cover for the heat bed, saying that the sheet of glass is likely to break during transit. The manufacturer tells the purchaser to simply obtain a sheet of glass of suitable length and width to cover the heat bed. The manufacturer does not give thermal specifications for a suitable glass.

If you were the manufacturer's product liability insurer, would you ask your client to show that the advice given freed the manufacturer from any liability?

Old Man Emu