Snuck down to the shed this morning and tapped out the last few threads, phew, what tiresome job this has been, just when you think you've finished, you find another hole to re-tap, especially all those 0BA holes over the steering cam.
I am certainly a convert to welding nuts onto broken bolts to remove them. I've even found when they are flush you can weld on a washer and then weld on a nut to get them out. It's like magic.
Hopefully get the sandblaster to pick the hull this week.