No rim tape necessary for rims without spoke holes such as your Ksyriums. I'm running Hutchinson Atom tubeless tires, with Stan's liquid sealant, on my Ksyrium Elite's at the moment, in fact; works great. I've set up Ksyrium SL's with Hutchinson road tubeless tires, with sealant and no rim tape for a customer, it's a nice setup.