OK, so Robinson get the design wrong, then scrap all the blades that have been paid for and make you buy new ones...? Would this happen in any other industry - i.e. the car industry, no they would issue a free of charge replacement.
Kev.
Well... no, as a matter of fact. It's exactly the same situation as Robinson. If you're in warranty, you're in luck. If you're out of warranty, then (unless there has been a big publicity splash about the problem), you have to live with the failure and pay for the repair.
Go to any auto repair shop and ask what the common failures are on any given make, they'll know off the top of their heads. For years, Smart car engines up to about 2002 regularly failed on one particular cylinder after about 45k miles. Smart offered no free repairs outside warranty. Fiat punto head gaskets go with alarming regularity around 65k miles, some Toyota cat's fail way too early, the list is endless.
The car manufacturers "do their best" (to be generous to them). Caveat Emptor once the warranty is through.
Lafite