Step 1: Join spine halves with upper pelvis.
Step 2: Add hips to upper pelvis.
Step 3: Add lower hips and attach ischium.
Step 4: Add cervical vertibrae to neck.
Step 5: Add ribs to spine.
Step 6: Add transverse processes to spine.
Step 7: Attach front legs to shoulders and add to spine.
Step 8: Assemble skull pieces and attach to neck.
Step 9: Add hind legs to pelvis and attach tail.
Step 10: (optional) Add Gastralia to ribs.
Where to add them is a bit of a guess since there is no fossil record of the connective tissue for this floating structure. We glue the tips of the gastralia to the tips of the ribs.