The problem of the chassis's cracking is either the result of a major design fault or the choice of an incorrect (or cheaper) material for the chassis tubing. Morgan are obviously aware of this and the offer of a free new bolt-in stiffening brace which can also be fitted free is tantamount to admitting to the problem, but lets not used dirty words like "Recall".
It is rather strange that they insist that the chassis's are inspected before they provide the free spacer and yet they will charge you £50.00 for the same item if you fit it and do not have the chassis inspected first.
As I (and others) have said earlier on this topic, fatigue cracks in their infancy would not be visible in the early stages (even if the paint were to be removed), so the whole idea of visually inspecting each chassis before fitting the brace is purely academic.
By the way, MMC told me that if the chassis cracks it is "Not Dangerous"
It seems MMC change the rules as they go along. I suggest you contact Steve Morris.