Here's my plan. I have 2, 5 yard sections of black ripstop from joann's. (I assume it is 1.9oz but have no way of knowing) I plan to make a tarp from this since I already have a hammock made out of the same thing.
I would like to have a pattern for a cat cut on the sides but have not been able to find one.

Anyone out there have a pattern or basic diagram for the cat cut?

After checking out Shug's videos I like the idea of having the doors on there for the cold months. I also plan to make a lighter/smaller one out of thinner material without doors for the summer.

Is the 1.9oz ripstop an OK fabric for a tarp? Is ripstop in general OK for tarp use since you want it to be water proof?