Hi There (just like you)
Like you, I have a 4dtv + 8 ft perforated aluminum BUD.
I also had a yearn to find out about this "other" satellite" system out there, so I picked up an FTA receiver + a couple of High Freq Splitters and attached it! There was nothing really that caught my attention other than the concept and sheer number of channels out there!
Since I was already getting KU and my system was "dialed" in pretty well (or so I thought), I had almost instant gratification!
BLIND SCAN as far as I am concerned is a must Have! Also since FTA is mostly KU, you will probably discover a few mistunes in an existing setup. With Blind Scan I just point the dish at an FTA bird, set the polarity on the 4dtv and hit blind scan...the FTA receiver searches the entire satellite and locks in the channels available so you can save them
The only "problem" (I am lazy) is using the 4dtv to switch polarity so that the FTA polarity is correct, depending on channel. It is a little bit of a pain but is worth it. Like you I am more interested on what I can pull in...so far it is simply amazing. THERE IS TV FROM PLACES THAT I NEVER EVEN KNEW EXISTED!
it is also fun picking up "feeds" just like the old days in C band!! I bought a little dish setup for dedicated FTA but have not installed it as yet. Will have a fresher outlook this spring!
I suggest starting at the FAQs above and if you have not been there yet...
www.lyngsat.com
Lyngsat will show you what is up there and you will have to cross reference the Satellite names you know from 4dtv over to the real names by their location. There are also some charts that list satellites in various name conventions.
Since you are already tracking the Clark belt...you are most of the way home!
Jeff