What sort or build weights are people getting? I saw the size 52 with 105 Di2 and 1300g wheels was at 8.4kg, slightly concerned that a size 58 is going to be heavy.
You have to compare apples to apples. The overall weight of 8.5kg included pedals, lights, computer mounts, etc.
I would argue you can find build at 6.9kg if you just weigh the bare minimal. The frame is around 1kg, so it should not be much heavier than your usual build.