I did it the moment we joined the empennage to the fuselage. We Cleco'd them together, 100%, put it on the rotisserie and promptly rolled it inverted, just because.
It stayed on the rotisserie through panel installation and wiring. When I took it off the rotisserie, it went right on to landing gear and then moved it to the airport.
Side note, the rotisserie in this picture has the center of rotation at 36" above the floor. I later modified it to 48", which is much, much better, in my opinion