Unholy Alliance, DirecTV HD via "Dish" dish.
When I first started playing with the Phase III with an SL3 to get HD on a dish smaller than a Slimline, I had mixed results. It worked very well in AZ but when I returned to No. NV it was marginal. I had read on the DBS Talk thread that a "Dish" 1000.2 could be used instead of the Phase III with better results so I bought one over the never-ending winter. The bolt pattern matched my Phase III mast assembly but, on my first try in early April, I got no signal. It was too cold to keep trying.
From here it got messy. I had a PM from a DBS Talk member that stated I could swap in my Slimline arm which is longer. Yesterday, between storms, I tried that and it worked but still not good enough. Signals weren't bad but the elevation settings were different which would drive one nuts during setup. I had also read a post on DBS Talk where a member had scabbed the SL3 to the top of a "Dish" arm. So, I took my Phase III arm and played for an hour or so with different positions, length from the pan and height from the Slimline arm. I ended up with 90 on the 101 and mid 70's on the 99 and 103. Good enough and the elevation setting is close to stated.
The distance from the "Dish" reflector edge to the SL3 arm insertion point is 18 5/16".
The photo shows a Phase III mast and back plate mated to a Slimline arm and "Dish" 1000.2 pan. Bolted to the top of that is a Phase III arm mated to an SL3. The 1000.2 measures 18 X 22 which is much smaller and lighter than a Slimline.
All that is now needed is some sanding and paint to remove the "Dish" logo.