Mark, you seem to be missing my point
I said that if all motors are available with both sintered and bonded rotors, then there is no problem - weather they have to be resubmitted - or if the EB change the list to suit does not matter a s@!*.
What does matter though, is if they do not make their range available for sale with sintered rotors throughout. If the only LRP/Nosram that is available with a sintered rotor continues to be a 4.5, then i'm not convinced that you should be allowed to take a sintered rotor and run it in a 6.5 - as that means you have to pay for a motor, take rotor out and buy another one. I'm not convinced this should be allowed.
From what i have been told, sintered rotors should be more reliable than bonded, but it seems that they are not 100% bomb proof. I have heard of some failing.