OK, I'm a ding-dong I suppose, but have you tried assembling the plane on a [link=http://www.harborfreight.com/cpi/ctaf/displayitem.taf?Itemnumber=38778]folding stand[/link] ($20 at Harbor freight) that holds the model up high enuff for you to get UNDERNEATH for what ever assembly work needs to be done? Then you simply lift the p[lane off of the stand when ur done and set it on the ground...no flipping over required.

This works for a model with one-piece "bolt on" wings (ex: Reaction 54) with the the wing straddling the stand then placing the fuse on the the wing, AND it works with "slide on (the spar tube)" wings (Dragon, Eurosport, Boomers) with the stands suporting the fuse instead of the wing.

A friend of mine who's in his 70's is assembling his 30+ lb jets this way, no problem. His Dragon and Euro fuses sit across the foam pads, then after the wings are slid into place over the tubes, he secures them via bolts from the bottom.