I have an old DISH 1000 strapped to my chimney with 110,119 and 129 working well into a 722. Dish menu system refers to it as a Dish 500 and It has 2 coax cables. I am upgrading to a Hopper 3. A DPH 42 I understand will make it compatable with the Hopper, but requires adding another coax. I also read that replacing the lnb with a DPPH will also work eliminating the switch and seems like a better solution. My question is, will the DPPH 3 sat head fit on my old Dish 1000 arm?