After a free Trio Avionics software upgrade to our Pro Pilot which gives us a huge new capability to track fuel flow with high exactness, we noted we needed to attach both pitot and static lines to the rear of the Pro Pilot. That meant tapping into both positive and negative pressure systems behind the panel. With the windshield already installed, this was not an easy task and required opening several bundles of cabling a tubing behind the panel. But, Doug, our master electrician and electronics guru, managed to use some pneumatic fittings we had left over to hook up into the pressure and vacuum systems. This required using 3-way and 4-way connectors and joining tubing of different ID and ODs.