Ok
we will fix the support for 80,40,30m also
questions
1, OK
2, Yes it shoud never switch off the SDA100, it's only the relay which can do it.
3, See SDA100 manual, you must switch on the SDA100 and let it be on for minimum 3 minutes, then it will understand that after disconnect and reconnect power it will switch on automatically. You can test that that it work without the RC-1216H also.