Having had my late 2012 chassis crack in that manner followed by the autumn 2013 replacement also cracking in much the same way, I certainly would suggest that only the 2014-on chassis with the welded in tube bracing stands a reasonable chance of not cracking in a car that gets used. I'm unconvinced that the retro-fit bolt in brace can provide the additional rigidity to avoid this type of cracking at the wishbone brackets. I do wonder just what proportion of the pre-2014 chassis have failed and how that compares to the proportion that have done more than a token number of miles. Bit of an interesting question. Hugo, hope MMC sort you out with a new chassis in a reasonable time and get you back on the road. Good luck with it.
