Eureka moment! Okay, by selecting Virpil CM50 grip, it activated the hat switch, shows as Hat 1, then by reassigning the trim functions to Hat Viewpoint 4 in the controls page, it is working! It is making some of my other switches, notably the small Up-Down-Press switch that is not found on the real F-18 grip, but is added on the TM grip, appear to DCS as a hat switch. A little weird there, but definitely workable.