the finished spine and yes i don't just look that complex those little tiny steps were not nice to build
i added not only one layer of glue at the inside remember later this thing will hold the whole weight of the upper torso so it have to be very strong
i also made a shot how you get the butterfly taps at the backside because i get only tab from the Pepakura designer i added one of my own on the other side of the piece and i cut out a little strap where i glued the pieces together
it's important for later because i will combine the spine with the chest in that way that it should hold.....FOREVER