Note from Mary:
Since the Wave doesn't have diamond wires, in order to have that bungee cord to prevent your jib sheets from catching, you will probably have to install a small eye strap on the front of the mast, maybe 18 inches or more up from the bottom, to run the bungee cord through. I would tie it off at the eye strap with a half-hitch or something, and then run each end of the bungee down to each end of the main beam and tie off there, where there is an opening in the trampoline at each end of the beam.

If that still doesn't work, you can come up with various creative variations on the same theme. And let us all know what works best.