HI!
I've been testing some overdrive pedals using the distortion loop of the Kemper and my profile HARLY EL84 10:00 (a Cornford Harlequin).
Today I profiled the Zendrive in front of the Cornford and, after some tweaking, they are almost identical!!! The profile is uploaded in the Rig Exchange and here is a demo:
http://dl.dropbox.com/u/3645952/zen.mp3
Saludos!
Paco