> << Lynn,
>  Good info on balancing the two rotors.
>  Does the rotor have to balanced within itself for a best balancing
outcome.
>  I'm doing a 'single rotor' and was wondering if I need to go that far.
>  George ( down under)
>   >>
>
> The rotors are balanced dynamically (spin balanced) from the factory and
then
> hand selected into sets that weigh the same within a few grams. Notice
some
> balance marks on all but one corner (generally).

Lynn,
I noticed this mentioned on other sites, but the RX8 rotors have NO
balancing marks ( read no drill or mill marks) on the sides of the apexes.

Perhaps, because of the better manufacturing process they are inherently
better balanced.

OR because the depressions ( and exhaust edges) are machined the balancing
is done within the same process.

It's something I guess I will have to check.

George (down under)