I'm trying to mount a 12x20 inch black and white photograph to 22x28 mount board. To accomplish this task, I have at my disposal an old Technal dry mount press with a 16x20 inch platen. Allegedly, it's possible to dry mount photographs larger than the platen by inserting portions of the photograph/mount board sandwich in the press sequentially. Does anyone have any practical experience with this technique? Can it be done without generating lines, folds, creases, and other artifacts? Or would it be better to bite the bullet and get a larger dry mount press?

Thank you in advance for your assistance and suggestions.