My suggestion would be to create limit ranges that cover the whole HF range, but designed so that each each amateur band is in only one range, I.e.:
0 - 5 MHz (includes 80m)
5 - 9 MHz (includes 40m)
9 - 13 MHz (includes 30m)
13 - 19 MHz (includes 20m)
and so on.?
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73,
Mark, N8ME
Mark Erbaugh