Not told MMC about this yet Keith, other than if they read it here? My warranty has long expired and I don't think it is a big enough job to trouble them with. I will probably weld it up myself and maybe add a bit more metal to the tab, in typical Morgan engineering solution style. This may be just an isolated case?
I was about to start fitting my nice new SPA oil temp and pressure indicator (thanks for all that info) but that will have to wait a bit longer now.