thanks for the suggestion.
unfortunately, i cannt get it to work. i will experiment more, i do see the height change, but it went from hollow to filled. (tried couple different vlues)
again, i do appreciate your suggestion, and will see if others add more to this.
i am an openscad new person, i don't mind experimenting.
i found a PRINTABLE workaround, make solid elevated text, put into cura, print as NO FILL, and no top layer, and make bottom layer thicker, and that enables printig.
have a great day !