You know I would really greatly suggest trying some Contact Cement. I started using this and it is SO useful. The problem with needing to push the pieces together before the hot glue dries is COMPLETELY taken away with this stuff, and actually it binds better than the hot glue. You can find all of the info in the
Ultimate Pepakura Glue topic. You can buy really small quantities of this stuff, but it lasts forever (you hardly use any) so its worth it.
Good luck with the rest of your build!