From the looks of the pictures on the sites you provided, it seems that the unit is not a fender eliminator as much as it's a taillight replacement. If you installed this and left the frame uncut, it looks like you'd have the two frame "sticks" poking out from the backside of your bike.
![Huh?](http://ducatimonsterforum.org/Smileys/classic/huh.gif)
![Huh?](http://ducatimonsterforum.org/Smileys/classic/huh.gif)
??