One-handed the side skins into place and just stuck a couple of clecoes in the upper edge (lower edge, fuselage is upside down) to hold them while I was maneuvering everything. Immediately noted the same issue that others have reported. The way they have you do this step with the fuselage upside down on saw horses, there is the potential for it to sag at the F-705 joint and cause a misalignment at the aft end of the F-770. As near as I can tell, there isn't really a better way to do this other than trial and error until everything more or less lines up. In my case, Here's what ultimately worked: 1. Cleco the F-770 L&R along the aft vertical rivet row 2. Stick a 2x2 block under the longerons at the center sawhorse, just aft of the F-706 bulkhead. 3. At this point, the tail is hovering above the aft sawhorse. 4. Didn't have a helper, so to get the tail down I used a strap around the tail to a 25lb weight. 5. Used some carpenter shims at the F-704 to fine tune the level, but basically pulling down the tail w/ a fulcrum at the F-706 put everything in pretty much the right position. Checked the fit of the longerons. The left one was spot on, but on the right one the sharp downward bend was off by about 1/2" at the fwd end of the side skin. I spend quite a bit of time working on this with clamps and bars and plastic hammers and whatnot, and got it where I wanted after about 90 minutes of gentle persuasion. I'm thinking that I want a set of shortened steps even though this is a taildragger. Like most things, opinions seem evenly divided between "Why would you do that?" and "Old knees really appreciate that." To that end, I did the cutouts in the baggage ribs and will kick the final decision on down the road for now. While I was head up in the baggage compartment, I noticed that I will need to relieve the conduit holes in the baggage rib to F-706 flanges. I marked them with a sharpie and will open up those flanges when I separate everything for dimpling deburring. Also fluted and match drilled the arm rests. The final thing today was to get out the carpentry shims and try to get the assy as level as possible so that it's equally supported at each point. The side skins come off in the very next step and get removed/installed at least once more after that. My hope is that by carefully shimming each point, I won't have to heave and push so much to get it back together next time.