I will be doing a lot of traveling for the next two months and room and weight w ill be an issue. I am taking the minimum amount of 4x5 stuff. One of the items I am considering leaving behind is my double walled plexiglass pre exposure dev ice. Should I be able to accomplish the same result by doing the pre exposure w hen I get home ? Although technically that would make it a post exposure. Any reason why the pre exposure can't be done after the fact? Thanks.