Here is Ben Healy on the Roadman Podcast recently. Video is cued up to where he is asked about his use of W’Bal in pacing solo attacks, such as the one that won him that Tour de France stage.
Just 20 seconds or so for his answer 
For those that prefer the transcript (directly from YT, so blame it for the translation!)
Anthony: How scientific Is the pacing for those solo moves? Are you leaning into like the WBA ball modeling and we’re seeing a lot of the world tour coaches start to
figure out. I know Dumbar use this WBA modeling with Vector for his Walta stage win. Or is it old school instinct?
Ben: To be honest, that’s the first time I’ve heard of that.
