Heavy bike lock mount on a carbon frame I have a foldable Abus Bordo 6500 which weights around 1.7kg. It came with a sturdy, rubber based case that can be mounted using bottle cage mounts. 

Is this OK to do so on a carbon frame, or does it open up risk? The bike in question has 2x bottle mounts and I was hoping to put this on the seat tube.

At the moment I am chucking it in my backpack, but a bike mounted solution might be a little neater for days I don't have my pack.

(I did search but most questions on this topic relate to pressure clamps for D locks whereas my issue is a bottle mount.)

Thanks
In general strapping 1.7 kg of mass to a CFC frame is not a problem. CFC frames are actually quite robust. However, I would be concerned about attaching the case to water bottle mounts. Water bottle mounts, brake mounts etc on CFC frames are constructed with an aluminum insert epoxied in a hole in the CFC. These can work loose if subjected to too much cyclic stress. 

This Hambini YouTube video explains how the inserts work (and how to fix them.

If the case comes with straps, I'd use those instead. Put tape on the frame where the case and straps touch it to stop paint being worn off by movement of the case.