Well, I finally put a 30 inch up and aimed it at 30W to compare to the 1.2 meter. (Both ChannelMaster)
I also inverted it to get it down to 6° elevation. (same problem with not being able to go that low in standard installation configuration)
tp, Q-1.2m,Q-30
11883,74,60 solid
12.091,71,37-44 pixelated
12171,77,60 solid
12050,74,35-40 hard pixelation
Think part of the problem is I was hot and sweaty and kind of in a hurry to get out of the sun. Should maybe have tweaked some more. Also think I have a bit of the 30 shaded by the sideways mounted 1.2 that's also aimed at 30W. Also confirmed that 30W here is just above, by only a couple of feet, the neighbors pine tree. Yeah, another 'temp' base - exhaust pipe, conduit, and some recycled decking. SS hose clamp and some deck screws. Oh well, other plans for it eventually. Maybe a universal LNBF and see if I can get some other international birds.