I want to add pull out tabs to the sides of my JRB 11x10 tarp. Kinda like those on the Warbonnet MJ or SuperFly. I've got a couple of questions before I start this:

1. How heavy of reinforcing material do I need?
2. Is the reinforcing material sewn to the inside, outside, or both sides of the tarp?
3. Are the tabs sewn ONLY to the reinforcing material, or are they sewn through BOTH the reinforcing material and the tarp?
4. Any magic as to where I position the tabs, or just wherever I want them?

I know I may be overthinking this; but the last thing I want to do is actually weaken the tarp by adding the tabs.