Mine is a 2011,
First off, I did my research, read all the posts that I could find here and on COG and identified the problem areas such as bolt removal and refitting.
I also looked at the fairing mod posts as it made sense to me to be able to take the fairing off and put it on for servicing without having to remove the cages.
I decided before I purchased the Canyon Cages from MCE that I would fit them with the fairings off, then mod the fairing and fit with the cages on the bike.
I used a breaker bar to crack the top bolts then a ratchet to remove them, they were very tight - I did not use any heat
I never had a problem aligning the bolts when bolting the cages on however I did spend some time cleaning each bolt hole thread very thoroughly, I did not use a thread tap as I could not get one locally, I used the blue loctite in case I had to remove them at some point in the future.
When fitting the fairings back on the first time I found it awkward at first however I have removed a refitted them a few times now and find it very easy and takes no longer than without the cages fitted.
Some photos:
Right Side:Left Side:Fairing Mod: - Same on both sides - Left side shown
Cheers
Paul