What type of lnb are you using?Locking a few 67w more forgiving TPs in Northern California using a motorized 90cm with max 6.2 CNR. Likely do better with an optimized fixed dish. Have a spare 1.2m, but not about to haul up to the shop roof to test.
11730 V 28888 - 6.2dB
11770 V 28888 - 5.9dB
11810 V 28888 - 6.2dB
11850 V 28888 - 5.9dB