Adding Ku

Hello all,

I am looking forward to adding Ku to my system, and I was wondering if
anyone had any experience/info on a Cal-Amp dual feed.  My local satellite
shop has a used one for sale with a Ku LNB.   Or should I buy a new
Chaparral Co-Rotor II Plus instead off of E-Bay?  It looks as if the Cal-Amp
doesn't have adjustable scalar rings....where the Chaparral does.  I have a
rather shallow dish (.4) and the "rings" on my current Chaparral feed are at
the "end" of the feedhorn anyway.
Any thoughts/concerns/comments would be appreciated...
Thanks!
Steve