These were Ash's fails
You could do something like this, a second bit of triangulation the other side of the upright. A wider plate at the bottom of the stay and on the tub frame to take 2 bolts. Wouldn't require that much cutting/welding and would make sure there were no problems at iva. It may have been a 1 off but I would hate to take that chance.
20131130_155954_Wilfreds Grove by
Series1Landy, on Flickr