Why would you want to flip it back and forth?
If you take out all the wood ..stringers , flooring etc.. and it iis right side up,
Look underneath the bow all the way to the transom before and after the wood removal. Notice how the hull will look like a pregnant cat after the wood is removed. some Hulls are worse than others. That'll answer your own question if you want to attempt it or not.
When I did mine I re-set the bottom flat then re-glassed the stringers, floor in. Then flipped the boat to finish the bottom after it was "Set".
I'm Not sure if this was right but it looks pretty good.
My picts are in the gallery
http://www.***boat.com/image_center/...t=7&thecat=998