OPLL channel indicator light.
I wish to add OPLL channel indicators for OPN+OPLL and OPLL+DCSG, using the first 6 FM lights as OPLL channels 1-6, and the seventh FM light as OPLL channels 7-9 and the rhythm drum. When using only the OPLL, use the first three of the four DCSG lights to display OPLL channels 7-9, or use the four DCSG lights to display the four rhythm drum channels.