The last pictures for now.
As expected it took me a few weekends to finish the repairs, but I have to say it was a very satisfying job. If I were to do this job again I would probably repair the frame before painting the chassis.....or at least make a better job of covering up the painted chassis. The grinding left small steel particles everywhere.....being hot from grinding they "sank" into the paint on the chassis and started rusting after a few days. It took quite some time to clean (sand!) this off again and repaint the chassis
The last picture shows the arch bars back from blasting, with some captive nuts left to do.....and some welding of where the dash-frame meets the arch bars, to get rid of the rust-trap.
Alex