I am hoping to buy one of these in the next few weeks:

Specialized Roubaix SL4 Expert Disc Di2 2014 Road Bike

But I will be using it for commuting and need some luggage so I need to fit a pannier rack (I'm going to ignore all the shouts of horror about using this bike for commuting or putting a rack on it).

Initially I thought that this was not possible and I was looking at getting a custom Titanium frame made with the same components. I have now found a couple of options though.

There is the Tubus set of pannier racks. I have used a Tubus rack before on a bike with no eyelets and it seemed to work very well. If I use the Tubus Clamp Set For Seat Stay Mounting and the Tubus Adapter Set For QR-Axle Mounting I think that'll work won't it? I am unsure if the rack will clear the disc brakes though...

There is also the Axiom set of racks as shown in the video. They specifically make a rack for road bikes with disc brakes which sounds very promising. I can't see how the rack will attach to the frame at the top with no eyelets and no caliper brakes. I could use the Tubus Clamp set though (which I have on my current bike)

So, Will mounting this to my bike damage the carbon frame? Any recommendations about which rack / mounting system I should go for?

Thanks