I'm currently spec'ing out a SX4882 for possible purchase. The entire board seems to be working proper; though, I'm having second thoughts about the output meters on the meter bridge. All the Input meters are working for channels 1-24 and 25-48. But, none of the subgroup meters nor the stereo master L/R meters do seem to be working. Is there a switch that controls these output meters that I have over looked?