The BB7 is more adjustable, both pads can adjust instead of just the outer, I'd say its worth the extra. The power on my Avid is immense, I like the system used to set it up too.
It's a mount for a shifter if you decide you want gears, as it uses a gyro. It's removable though. Theres a few changes actually, it comes with a nicer chain ring than that and comes with Atomlab bars too. Theres mine
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I only had MS Paint on this computer, it's allowed to suck terribly. Windows ME, 800x600 resolution ***. I wanna make it bigger, cos I hate small resolutions, but it ruins everything on here.
You are meant to be able to undo the bolts you know, it just stops them rattling loose. It won't feel too different when you undo them, its not superglue.