I tried a corbin for about 30,000 km's on my 900 monster, including a number of long trips and it never did break in much. It was a brick when I bought it and a brick when I took it off.
I probably shouldn't say this as I will one day likely try to sell it here, but I hated every second on that f*#king thing.
There's already plenty of ppl saying exactly that. Didn't stop me from buying mine. I loved, and still do, the look of the thing.