It did, though the left padding still stayed, and I still can't change the width of the sidebar no matter what I use (em, px, or %). And I just noticed that there's #secondary .module-search .search-box in te css, but I can't set search in the customization area neither in the main module section, nor in the section module section. (And I meant to say 100% instead of 10% above!)

But I need to look into that tomorrow as it's getting quite late in my part of the world. Thank you again, you definitely made all these customizations easier for me.