Generally you want to model your high poly for so that it will bake well, that includes some thinking about shapes and how it will bake. Alec Moody included this example in one of his 3dmotive tutorials, obviously the 2nd example will bake better and look better in the end. The only think I'm worried anbout is those rows…
You could still use a mask for the grid and bake the wires as mask on a plane aswell. Though for a tiny prop, it's probably better to go like on alec moody's example, not too much offsets.