I have an 80cm penta dish at 19.2E and have Sky Q fed from the dish provided by Sky at 28.2E.
I wan't to have 13E, 19.2E and 28.2E via fixed LNBs and a motorised dish to move about for other sats (30W, 5W, 0.8W, 9E and others as needed). I don't think adding a 3rd dish for the motorised set-up...