Since there has been no feedback on how to enable converting pre-set dim to extended commands, I chose what should be the most universal. When a jumper is added inside the XTB-XM, it will transmit the extended command doublet after the pre-set dim command. The extended commands are sent as a doublet so the XTBR and XTB-IIR will repeat them as it does for the CM11A, CM15A, and Ocelot. And when enabled, the ACK is sent to the Harmony when the extended transmission ends, delaying it about a second. Hopefully that will not be a problem.
I have not heard back from Smartenit regarding a used or loaner Harmony, so I will have to buy a G2 for testing.
Jeff