I'm looking at The Legrand Orange Book template which offers a lot of possibilities out of the box for creating a professional looking book for educational purposes. From the main.tex file I gather that it supports A4 and letter. I'm bound to a smaller size of 17x24cm for creating a hardcopy book. I'm not too familiar with this template and wonder if people have experience in modifying this template. Does modifying the standard size require a lot of adjustments?
Link to template: