My number one son, Sean, came over recently and between the three of us (Connie helped) we got the fuselage flipped up onto the jig. I added some stops to the jig cross members at the front and back of the fuselage structure to keep it from slipping sideways. I can still remove a couple of the cross members to make it easier to move around under the fuselage. I expect to spend quite a bit of time on a stool under the fuselage bucking rivets.
Anticipating the need for some light while working under the fuselage, I purchased a couple cheap floor work lights from Lowes (see Image 3). These came with 500 Watt halogen bulbs which are really bright and fairly hot (nice in the winter but not so much in the summer). Since I don't need quite so much light, I replaced the bulbs with 150 Watt units. Hopefully, these units will do the job without getting in the way.