Juan and I found that this is MUCH easier to do with two people with one person holding the ribs in place, all lined up, while the second person tightens the clamps.
The order you'll glue the ribs to the blocks:
Upper corner blocks
Lower corner blocks
Use blocks shaped to the outside curves of the corners, top, bottom, and shoulders (optional, especially if you have a second person holding them in place) between the clamp and mold to hold the curves in place.
THE BOTTOM SEAM
Juan showed me how to measure and plane the lower bout ribs to join up just right at the base of the violin.
We tried a really neat trick in The Art of Violin Making (http://www.amazon.com/gp/aw/d/0709058764/ref=mp_s_a_1_1?qid=1407299133&sr=1-1)
that involves overlapping the bottom ribs by a millimeter and securing with masking tape. Then you put the outsides together and meet the ends together and when you open it the masking tape kinda stretches and pulls the ends together in an elastic, tight, rubber band kind of way. Such a helpful tip. The diagram shows how to do it much better than I'm explaining it.