I've managed to get some more wiring done. The VPX switches, including the flap switch, are now wired to the ground bus & VPX in addition to the main ground wires from the VPX (the elevator trim switches still to come). I've decided to use this ground bus for the IBBS back up battery too. There is little current required as I will not be utilising the passthrough function of the IBBS so as far as I am aware, the charge current of 2.5 amps is all the grounds need to support. I need to tidy up the DB plug wires at the VPX and will lace the looms when most wires are in place.