I've got several vertical rigs and one horizontal. Rarely do I wear a shoulder rig concealed however. Have one vertical rig for a 3" K frame that I usually use when canoeing. Have always deployed with my M7 tanker rig for open carrying my issued M1911 or M9. Generally however prefer strong side carrying on the hip. The few times I carried a shoulder rig CCW was with my horizontal 1911 under a jacket, also carried either the Beretta 92 or Coonan on the right hip.
CD