Hi everyone, I'm the proud co-owner (since last week) of a '74 M20E currently equipped with : Vaccum gauges (6 pack) 530W + 430W Accutrack autopilot GTX 327 Basic fuel and engine monitor by Electronic International And we decided we want to go all in a glass panel overall: G3x + primary engine monitor G5 backup GFC500 GNT750Xi + GMA35 to help with the cost, we are thinking to re-sell/trade in the 530W and 430W bu