Hi hbatts , sorry to hear your problems .
It seems the Morgan upgrade you fitted isn't up to the job . I've not heard of anyone having their cracked chassis welded up , i would be wary of doing this without checking very carefully that nothing is bent . Mine was really noticibly out of true . I think previously everyone who has had a cracked chassis has had it replaced , obviously that's a lot easier for people over here . As well as Matty I believe Calum (RedThree) is now on his third chassis .
I was under the impression that Morgan had agreed to replace cracked chassis on the early cars even when the warranty has expired . Although in the letter they sent out regarding checking for cracks they stated that "During normal operating there have not been any recorded instances " !! Much as they denied the bent wishbones on early cars , I'm in danger of getting annoyed so i wont mention bump steer ...
Anyway I would contact Morgan directly sending your pictures and see what they say , it is a serious issue if the triangular bracing is not doing what it's supposed to .
Hugh


Hugh