Made a DIY Hex 12 using Silpoly 1.6 in Moroccan Blue.
Modified the dimensions a bit for a shallower cat cut, and a couple of inches extra on the overall tarp.
Opted for radial reinforcement patches, grosgrain tieouts, flat felled ridge seam, and a rolled hem perimeter.
I cut the drops extra long to make grizz beak style doors in the future from the leftovers.
This was a challenging project, due to the slippery nature of the silpoly and the cat cuts. The reward is well worth it and I learned a great deal on this project. Clips were my best friend keeping the material from walking. This is a durable tarp and while it is a little heavier, it should last for years.
RBTR gave me all the instruction I needed to get started and I made revisions using the help of the hammockforums.net peoples.