warped RK05 pack -- lost cause?

[Christian Corti]

On Wed, 9 Jan 2019, Fritz Mueller wrote:
> So, one of the things I have along with my 11/45 is an RK05 alignment 
> cartridge.  Unfortunately, its seems warped -- rides up an down a few 
> millimeters in each direction as you turn it in an RK05 drive. :-(

I don't think it's the platter but perhaps a dirty hub ring or centering 
cone. Try cleaning the ring and the cone of your disk pack.

Christian