One of the Marks at the factory told me when they changed my chassis( very close to end of warranty) that Morgan would not let any customer down with a broken chassis. Implicit in his statement; taking into account the tone of our discussion was that a broken chassis in or out of warranty would be dealt with by the factory. Although a very serious problem I have personally identified two broken chassis on cars in use, which even the owners did not detect. It apears there is enough metal and bracing in place to stop a catastrophic failure occurring and perhaps it is for this reason there hasn't been a recall.
If the chassis is going to go it will usualy start to show problems around 4000 miles.
It is easy to get despondent with the 3W. However once back in the old girl and all is forgiven. The more you drive them the more you fall in love.