Got it all set up!
This is a 1.2 meter dish, typical of what you would find being used in VSAT applications, such as on a gas station or store for credit card purchases. There is a feedhorn which is joined to a dual-path waveguide by what LOOKS like a common C-120 flange (but is NOT). The dimensions are very similar, but the flange is threaded on both sides AND only two of the holes line up with a C-120 LNB. As Kevin needs both polarities from 97w, and doesn't want a multiswitch to be involved, I brought over one of my Hughes LNBs (purchased from that guy on E-Bay who was selling them in boxes of 8). We took the waveguide with the transmit and Ku receive LNBs off, and replaced it with my Hughes LNB. I was able to get only two of the screw holes on the feedhorn to match the Hughes C-120 LNB. I advised Kevin to simply tighten up the two bolts, which, along with the O-ring inside, seem to be keeping the interface between the feedhorn and the Hughes LNB tight. Don't know what kind of flange mount that is, but it is not a standard C-120.
The Hughes LNB aligns perfectly (with only two bolts) to the feedhorn, so we got it up and mounted. I figured on 22-24 degree offset, seems to be between 24 and 26. Finally got signal on 97w after some fiddling. Will tweak tomorrow