Interesting little idea to have both brakes operated by 1 lever, especially since it is the right hand lever. This dedicates your left hand for your clutch lever, or for picking your nose. In either case, you might want to consider shortening the brake cables on your bike to provide you with crisper feeling cable brakes. Most bikes that come with cable brakes whether disc, v-brake, or canti-lever all have their cables too long. Consider taking the cables out and trimming down the cable housing to the length required on your size frame and handle bars. Just remember that if you ever upgrade to a longer stem or handle bars, you'll need to get longer cables as well. But trimming down the cable housing so that they don't all bunch up at the front of the bike as much, always looks better and they seem to work a little crisper too (at least I found they did). Just be sure not to trim the cable housing too short so that they bind when you turn the handle bars. Make sure you replace the metal caps on both ends of the cable housing after trimming them and then feed in through your cables. You'll notice that you now have a lot more cable coming through and you just need to cut off this extra amount after you connect it through and tighten it into your brakes. I imagine you'll want to adjust both brakes to engage at the exact same time with this one handed lever and you can probably do so by playing around with the adjuster barrels on the lever itself.
Good luck.
Steve