and yes the max time he will be "chicken surfing" is like 10 seconds and then its done, its not a birg deal, but i totally understand where you are coming from i wouldn't want my hens to be tortured by a roo either.
your hens will most likley lose feathers at first, but just let the chickens do their thing. It may be hard watching the hens lose their feathers but the rooster seems to be missed with the hens, and it isn;t a good idea to keep a chicken solitary since they are flocking animals