Installed the GPS-20 mount behind the pilot's seat and also did a final fitting on the headset mounts. All that's left there is to drill the holes for the jacks and the USB power I am going to put on the pilot's side. One of my issues in setting up the wiring is figuring out how long the various wire runs should be without having a lot of the stuff actually mounted (like the panel and the left/right avionics trays). I saw this idea on You Tube (where else) and thought it might have some merit so I gave it a go. Ran paracord from the various places that I know things are going to be mounted and how the wires will be routed forward to the panel/trays. You run a main line from the farthest aft item to the front and then tie on offshoots from that main to the other items moving forward. For example I ran the cord from the trim power/transponder all the way up to the panel area just like I expect to run the actual wire. Then I moved forward and tied a piece of cord from that main cord over to the GPS-20. Did the same for the control stick wiring, head sets, etc. Once you have all that done, you remove the cord and what you have is a "tree" that lets you figure how long the wire needs to be to get from the panel/avionics trays to the various items and hopefully not have a lot of extra wire you just cut off or worse, wire not quite long enough. I did all that and it seems to be a pretty easy method of getting the wire lengths dialed in.