In Ask Dave 159, I used a hex beam model for EZNEC that was put together by the antenna’s designer, G3TXQ. The following link takes you to G3TXQ’s page where he describes the modeling.
The following link takes you to the model itself, also hosted on G3TXQ’s web page.
Note that the model does not include 6 meters.
I recommend you watch my video prior to using the model: