Yes, the wave was working quite well that day as you can hopefully see from these pics. First one taken at an altitude (5,286m) around the same level Keith was flying his task and at about the same time. Second from the ground after we landed. Max altitude was ~22,300 ft, still in strong lift.

https://www.dropbox.com/l/scl/AAA4r3...7gjseTdsFKpsHQ

https://www.dropbox.com/s/ke0wanzxci...ender.jpg?dl=0