I would say the 14, it has the latest and most complete manual matching its parts. Routings for all the wiring, well thought out and just got a new faster (in the air) version!!
Well just talked to my buddy, he won't be heading this way until sometime next year, so may end up shipping empennage and wings, and let him drive the fuselage this way when he comes. Friend works for a telco in Molalla, OR, what are the chances of that!