Difficulty to define the parameters para "Support" in cura 2.4

[dovk179 0]

Hi,

My printer is Anet A8. I am trying to print a Fan in cura 2.4 I am using the option Touching Build and expect the support build up to be under the wings that are not touching the surface. I expect the support build up to be under the hanging area ( the wings) but it covers the whole area. changing to the option everywhere I get the same results. I tryed all angels from 2 to 89 for the support over hung angle.

can any one suggest a video or a tutorial?

thanks

Dov