Yup, You guys are correct.
I took the LNB off the flange last night and indeed I only saw one probe in there. Because I don't have any other waveguides and don't want to spend too much money on this dish (you are also correct, it is a 1.2M channel master) I just installed my Invacom lnb on the dish (it has a 40mm clamp so it fits nicely).
I've tried to attach (hope they work) an image of the norsat LNB i have plus the waveguide/feedhorn assembly attached to it. I've also attached a pic of my current setup which supports the dish in my garage.
I had to set it up this way because the one side of my house is where I have all my satellites mounted to see from 61W to 148W and unfortunately to see from 12.5W to 61W I need to mount a dish on the front of the house, which the old lady says is unacceptable. So I have temporarily setup the dish at the front of the garage to see what is out there on the atlantic sats and when I am done with it I will probably give the dish away on this forum, and if there are no takers, I'll part it out, failing that it'll be getting cut apart and taken to the dump.
So Far I have been able to tune (with great signal quality), Hispasat @ 30W, mystery sat ( NSS7 or I905 ) and Telstar12 @ 15W. Will try to get T11 and PAS3/6 tonight, and if I get ambitious I will try to shoot for atlantic Bird 1, which is quite low for me (4.5deg elev). BTW I am near Toronto.
Thanks for the help guys.