That braid is fine, use the widest that is practical and easy to work with. No need to drill extra holes if existing holes line up. You don't need to swiss cheese your frame, just make sure the existing holes are clean and maybe use a bit of dielectric grease or silicone to keep them from rusting too much.
"Stand your ground. Don't fire unless fired upon, but if they mean to have a war, let it begin here." -- Capt. John Parker