Softgaze and X would work fine for you. The whole point is NOT to hard focus but to look at the middle of the page with a softgaze, no defocused eyes. Defocusing can cause lithergy.
page size sometimes is a problem for me also. Moving from like a Textbook to a novel seems a big jump. Adjust your viewing distance and see if your feel that you can take in the book. DO what is comfortable and feels best for you.
Chang Liu
