So far I've had moderate succees with hanging the print to dry, then using my "poor man's press." Essentially it's an old FB print dryer but I sandwich the dried print between two ferrotype plates (to avoid contamination) and stretch the canvas over the whole shebang. 15min at 200degF gets it mostly flat, a slight curl but that's about it. It'll work until I can get a real dry mount press someday.