I hope someone from BMC watches this.

When we get problems, the first thing to do is ascertain what the problem is.
We show you how to use a reamer on a carbon frame and present reasons not to do so.
Tools used in this video:
Bore Micrometer
Internal Micrometer
Feeler Gages
40.95 go gage
Park tool 744 - 40.98 reamer
400 grit wet paper
Park tool BB Press
WERA X3 Torque Wrench with 1/2 drive head
Our own syringe grease applicator - in shop soon
This was a BMC Teammachine fitted with SRAM RED components, and a SRAM DUB BB.