I should have noted previously that I have bumped up my training difficulty and changed from the triple to the compact virtual gearing. This is in part trying to finally get the Tacx gearing to show on the Zwift UD and partly to increase the verisimilitude of the virtual experience. No gears yet, but I could feel the difference in all of today's climbing. The six racers sorted themselves quickly, with me settling into fourth place ("race score" just doesn't let us low-enders compete). That was true in-game and on Zwift Power, where I have 2.0w/kg or 139w (144w normalized). For what it's worth, my race score did go up. It was reasonably cool in the pain cave, starting between 71 - 74F and winding up a pretty uniform 74F. I opted for one of the "180 bpm" workout playlists, knowing I'd want to keep my cadence high on the climbs.