Draco & SuperDraco engines

[allmappedout]

Hi all,

I was reading up about the SpaceX Dragon module, and came across the Draco RCS module which is currently used for orbital maneuveuring. What I also saw was that they're planning to install SuperDraco engines, which produce huge amounts of thrust. Now, what I can't work out from any articles is whether this is in addition to, or as a replacement for, the Draco thrusters?

Since the thrust is so high on the SuperDracos that it can be used as part of an LES, my thought was that there's no way these can be used for fine orbital control, but then it does mention that it has full throttle control and multiple reignition facilty.

Does anybody know one way or another, and have any sources for verification?

sources:

http://www.spacex.com/news/2013/04/04/draco-thrusters

http://en.wikipedia.org/wiki/DragonRider

[K^2]

Addition to. SuperDracos are designed to produce axial thrust. That's all you need for landings, so long as you can throttle them individually, but it won't do for docking. Similarly, you aren't going to be able to throttle down 120,000lb engine to anything suitable for precise docking maneuver.

[allmappedout]

Cheers, that's what I was thinking, I just couldn't be certain! The Dragon looks like a very ambitious piece of kit once it's completed.