I forgot about Ken's writeup until now. My senior moments are evidently lengthening...
Look here:
http://www.firstcoastcobraclub.com/viewtopic.php?f=1&t=96
I don't recall whether there's a switch to turn off the assist, or if the pot that controls the amount of assist goes all the way to zero, but I suspect it gets pretty close.
It's been in there for a good number of sessions on the track at Daytona as well as a bunch of cruises on the street and seems to be doing the job just fine!
Tom