In past projects, I've glued shells to a lightweight frame of formers and stringers. For a variety of reasons, I've decided to glue these shells together on a temporary frame.

The additional set of formers (duplicates of those made for the forms) are drilled for a support tube and notched for stringers. The formers are placed on a piece of 1" steel tube with the same spacing as on the original forms. The stringers are doubled up on each side, but only one will stay with the final shell. Everything is lightly tacked in place with CA.