We managed to sort the G3X issues out and the VP-X is working well. The photos below show the VP-X working. When a fault is detected the EFIS 1 and 2 warning lights illuminate on top of each panel, as well as a Msg. on the PFD and MFD display.( also an audio warning ).
Photo 1. PFD no electrical fault. Photo 2. VP-X detects a fault. Photo 3. MFD electrical schematic displayed, ready for reset.