Get Rid of Duplicate Photos in Aperture

[SJ99]

Any suggestions for an app to do this? Need to clean my library before moving to Capture One Pro. Lots of good reviews on Photosweeper 3. Found Aperture Duplicate Detector by Blue Pill Software, but can't find any reviews of it. Any experience with these two? What do you recommend?

 

[Weaselboy]

http://www.brattoo.com/propaganda/

I used Duplicate Annihilator on a friend's iPhoto library and it worked really well. I see they make a version for Aperture also.