I got it to work. The issue was that the DIY channels are hidden but active if you select one to make it a channel. No instructions. Your 100% right about ch.20. Can't be programmed but will take the info and do nothing with it. Should be locked out in the software.
I made three new DIY channels which became 31-33 in the radios memory,but you have no indication they have been saved when you hit enter. I had the software write to the radio and on the 2nd try the new channels were saved. A bug there. Would go to 99% and just run forever.
Radio test with the Rubber Ducky antenna will hit two of the three repeaters in my area. With the included "Long Range" antennas the seller included I can hit the third repeater that is not line of sight and 12 miles away. Sandia repeater is 16 miles away at 10,000 feet on top of the mountain and the little radio hits it like gang-busters.
My signal report was very good with great audio through several repeaters out 200 miles to my East, and I was able to hit AZ with very strong signals as well.
Thank you for your help guys. I think I will post instructions on how to program the new software 06.03.009 which is diff from the earlier software. Leave it to the Chinese.
I still cannot find any info on DIY channels but have figured out how to use them.
73