Measured from the front edge of the carbon roof.
12.5 to first hole.
26.75 hole to hole.
39.375 to the second hole.
Measured from rear edge of the carbon roof;
12.875 to the rear hole 38.75 to front hole.
.375 to .5 outside edge of the gutter to the center of the hole
Same distance as the round impression but in a different location.
Drill with a 1/8" drill to be sure that you hit the hole then enlarge with a 1/4" drill them a fly-cutter of 1/2"
Install BMW part 07 14 7 153 767 with thread lock on threads and a black weatherproof sealant at the top threads to seal for water.
you will need 4 of these before you start. 07 14 7 153 767
or this
https://f80.bimmerpost.com/forums/sh....php?t=1344846