Thanks Andy. Sat with the front group until the first climb, then I lost them, just as expected. Then a bunch of slower riders caught up, and I sat with them. Unfortunately they seemed pretty content at around 3-3,5 wkg, so the gap just kept growing to around 1 minute, even though I tried to set a higher pace a few times. But at the climb I got dropped again, and from then on it was just jumping back and forth between different smaller groups.
Stupidly I forgot to use my Draft PU on the last km. Might have shaven 5-15 seconds of my time, but I was too focused on keeping the cadence High and finishing below 1h14m.
The time at the top said 1:13:35 when I crossed the line, but 1:13:59 center screen (and 1:14:00 on ZP). I think I have seen this top/center discrepancy in all TdZ rides. Anyone know why?