Walking tenths are accessible and simpler using the thumb of the right hand. The melody can be deserted for the upper voice of the tenth so long as you can jump back to the melody when required. Watch and listen to Quennel a lot of the time there's no melody with the tenths he plays. I know he can do it anyway. But just ask Quennel to demonstrate this method. I don't think he has. I don't have a channel. Good luck...