there's a hole in my outrigger

So moving forward up the car next in line for a waft over with the welding wand was the outrigger. Rust here is commom on these cars but it wasn't helped by somebody screwing mudflaps onto them, the water sneaked past the presumably unsealed screw holes and into the inside of the box section outrigger, only on way it's escaping then.
Sombody has also been here before me with the angle grinder too and lopped huge slabs of metal out and not replaced it with anything at all. Great.

Outrigger as found with rust and parts missing from the lower section.
from the front looking back.

from the back looking forward.

so i joined the angle grinder fun a cut out a load more so it ended up like this.

hole cut by p.o. (previous owner)