After my wife figured out I had the com cable driver and Midland software on different ports, I got my MXT400 programed as I want it. Confirmed you can program the blank channels to something new and that the radio recieves 70cm HAM just fine if you program it to receive it. I have 8-14 programed to monitor nearby 70cm repeaters as a convenience. When I first turned my radio on after programming and went thru the channels with the dial or hit scan, it only went up to 22, but when I pressed the up button on the mic, it went all the way thru all 30 channels and now always sees the repeater channels. May have needed to be cycled on and off again or something like that. Still waiting on 65 ft of LMR 400 to do my permenant antenna mount above my roof line.