1foot coax + yagi0900=daughterboards?

Hello Everyone!
Just curious;
Has anyone used the 12" coax included with the yagi0900 antenna?
It seems like the coax soldered to the heavy antenna(relative to
daughterboard) would be hard on the SMA connector on the
daugheterboard, and eventually cause problems. It seems like a rigid
coax would work best but I don’t know how good of a connection one
would get.

Has anyone run into this problem?
What are you using to connect the yagi900 antenna?