Here is my 620g version of a Hex 3. It is made out of a silicone spinnaker fabric called Dynakote 75. It took me around 10hrs to make. It was computer designed and plotted on a laser cutter at the sail loft I work at.
I stuck it together using a japanese double sided tape, this has eliminated the need for seem sealing but has added aprox 100g to 120g to the final weight.
All photos were taken with a wind speed of 25+knts. It was extremly stable and has a taught pitch.
Front view of door
Side view of double vents
Vent close up
Inside vent detail
CN 13 pole sleeve