Glad you managed to sort it. Looks as if it may have lost the RH elevator retaining pin in the past which allowed it to swing out and put strain on the housing. Auto level header must add to the strain. Always thought the Danish built machines were not built heavy enough compared to the North American MF combines.

The MIG welding methods that work the best is to trace around the weld puddle. This helps keep the heat in the weld and makes the weld appear a little better. This works with flux core as well. I had to work on a MF combine in 2010 where a bearing went dry on the head. It was a great deal of glowing metal and peening with a small hammer to get the sprockets off the shaft. In this case the peening was to cause small vibrations in the taper joint as the sprocket cooled, to cause the sprocket to jump off the shaft.