Yeah, my host recommended against it. They are on php 7 and MySQL 5.6/5.7 A lot of things might break. I will await your update but try to build the store with ecart. I see there are dynamic variable options in the tutorial for products, and it looked like you needed to upload the old ecommerce sql to get the variable options, but I suspect you can add them as you are building it straight from eCart? The only thing might be missing is subcategories, but I can perhaps create keywords for the sub cats and use that for the search options.