Carbon Fibre rear shock mount

[steady_eddie]

My X2C came with a carbon rear shock mount but it doesn't fit because the tab with the 2 screws on the gearbox housing gets in the way.

Am I missing something with this - am I supposed to file that part of the gearbox away (which I don't want to do as the shock mount won't be as solid anymore) or is it just a poor part that doesn't fit?

Are there any c/f parts that fit properly or some-other stronger rear shock mount (broke 1 already...)