I want to make some modifications to the templates, but before I begin, i have a question :

My favorite template is Frosty. So my first intention was to override it. But the description of the wireframe template, which said "...Any customizations should be done on this base theme" make me hesitate.

Does that means I must absolutely start from Wireframe, then put on it the overrides I like from the frosty template, then finally put on top my own overrides ? The simple override directly on top of frosty seems to work, but I don't want to fall on a big wall after hours of work.