Wings
I delayed attaching the wings permanently until the very end.
That said, I did install them temporarily, in my workshop, to do the rigging. I used two 3/8" hardware store bolts for each wing as pins. I did all the initial rigging, plumbing, and wiring, then removed them again. My wiring is terminated with Deutsch connectors and plumbing with AN fittings, so removing the wings was easy.
When I did get to the airport, It took very little time to install the wings permanently. Plugged in the pre tested wiring and good to go!