Hiya Mike
Can't say that I use a Hex Beam myself, but after having a look at the design on the web I seem to recall seeing a similar design in use many years ago, but the name escapes me at the moment.
I will have to dig out my well read (for "well read" think *dust covered*) antenna books and see if I can find the name of the design.
I did use an 80m Fritzel antenna on six, and that worked great, but I shudder to think what the radiation pattern looked like (I had it configured as a halo!).
You will have to keep us updated about its performance.
Best 73, Mark.