Hi Martin, I just drew in a line at 30 degrees, mirrrored it, and then placed it in a location that looked close to what you wanted.

I thought that you were focused on the 30 degree angle part. I'm not so sure that drawing you posted has enough information to actually specify where the line should be positioned at.

So since I didn't see that information called out, I just placed it at spot to give the same general appearance as the 3D image there.

- Michael