This may or may not be connected (
) , but I have heard of LUK & other manufacturers of the solid conversion for Dual Mass flywheels stopping production / sales.
A chap at work has a Mondeo diesel & his dual mass is rattling, I mentioned the LUK solid conversion and he said that a mechanic mate of his told him that they have been stopped due to snapping crankshafts because of the (I think) weight difference.